21287448

素因数分解:

$2^3\times 3^4\times 7^1\times {\mathrm{13}}^1\times {\mathrm{19}}^2$

素因数の和:76

約数の個数: 240

約数和(自身を含む): 77449680

約数和(自身を除く): 56162232

約数列:

[1, 2, 3, 4, 6, 7, 8, 9, 12, 13, 14, 18, 19, 21, 24, 26, 27, 28, 36, 38, 39, 42, 52, 54, 56, 57, 63, 72, 76, 78, 81, 84, 91, 104, 108, 114, 117, 126, 133, 152, 156, 162, 168, 171, 182, 189, 216, 228, 234, 247, 252, 266, 273, 312, 324, 342, 351, 361, 364, 378, 399, 456, 468, 494, 504, 513, 532, 546, 567, 648, 684, 702, 722, 728, 741, 756, 798, 819, 936, 988, 1026, 1053, 1064, 1083, 1092, 1134, 1197, 1368, 1404, 1444, 1482, 1512, 1539, 1596, 1638, 1729, 1976, 2052, 2106, 2166, 2184, 2223, 2268, 2394, 2457, 2527, 2808, 2888, 2964, 3078, 3192, 3249, 3276, 3458, 3591, 4104, 4212, 4332, 4446, 4536, 4693, 4788, 4914, 5054, 5187, 5928, 6156, 6498, 6552, 6669, 6916, 7182, 7371, 7581, 8424, 8664, 8892, 9386, 9576, 9747, 9828, 10108, 10374, 10773, 12312, 12996, 13338, 13832, 14079, 14364, 14742, 15162, 15561, 17784, 18772, 19494, 19656, 20007, 20216, 20748, 21546, 22743, 25992, 26676, 28158, 28728, 29241, 29484, 30324, 31122, 32851, 37544, 38988, 40014, 41496, 42237, 43092, 45486, 46683, 53352, 56316, 58482, 58968, 60648, 62244, 65702, 68229, 77976, 80028, 84474, 86184, 90972, 93366, 98553, 112632, 116964, 124488, 126711, 131404, 136458, 140049, 160056, 168948, 181944, 186732, 197106, 204687, 233928, 253422, 262808, 272916, 280098, 295659, 337896, 373464, 380133, 394212, 409374, 506844, 545832, 560196, 591318, 760266, 788424, 818748, 886977, 1013688, 1120392, 1182636, 1520532, 1637496, 1773954, 2365272, 2660931, 3041064, 3547908, 5321862, 7095816, 10643724, 21287448]

約数ペア:

[(1, 21287448), (2, 10643724), (3, 7095816), (4, 5321862), (6, 3547908), (7, 3041064), (8, 2660931), (9, 2365272), (12, 1773954), (13, 1637496), (14, 1520532), (18, 1182636), (19, 1120392), (21, 1013688), (24, 886977), (26, 818748), (27, 788424), (28, 760266), (36, 591318), (38, 560196), (39, 545832), (42, 506844), (52, 409374), (54, 394212), (56, 380133), (57, 373464), (63, 337896), (72, 295659), (76, 280098), (78, 272916), (81, 262808), (84, 253422), (91, 233928), (104, 204687), (108, 197106), (114, 186732), (117, 181944), (126, 168948), (133, 160056), (152, 140049), (156, 136458), (162, 131404), (168, 126711), (171, 124488), (182, 116964), (189, 112632), (216, 98553), (228, 93366), (234, 90972), (247, 86184), (252, 84474), (266, 80028), (273, 77976), (312, 68229), (324, 65702), (342, 62244), (351, 60648), (361, 58968), (364, 58482), (378, 56316), (399, 53352), (456, 46683), (468, 45486), (494, 43092), (504, 42237), (513, 41496), (532, 40014), (546, 38988), (567, 37544), (648, 32851), (684, 31122), (702, 30324), (722, 29484), (728, 29241), (741, 28728), (756, 28158), (798, 26676), (819, 25992), (936, 22743), (988, 21546), (1026, 20748), (1053, 20216), (1064, 20007), (1083, 19656), (1092, 19494), (1134, 18772), (1197, 17784), (1368, 15561), (1404, 15162), (1444, 14742), (1482, 14364), (1512, 14079), (1539, 13832), (1596, 13338), (1638, 12996), (1729, 12312), (1976, 10773), (2052, 10374), (2106, 10108), (2166, 9828), (2184, 9747), (2223, 9576), (2268, 9386), (2394, 8892), (2457, 8664), (2527, 8424), (2808, 7581), (2888, 7371), (2964, 7182), (3078, 6916), (3192, 6669), (3249, 6552), (3276, 6498), (3458, 6156), (3591, 5928), (4104, 5187), (4212, 5054), (4332, 4914), (4446, 4788), (4536, 4693)]