21380814

素因数分解:

$2^1\times 3^3\times 7^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{229}}^1$

素因数の和:279

約数の個数: 128

約数和(自身を含む): 61824000

約数和(自身を除く): 40443186

約数列:

[1, 2, 3, 6, 7, 9, 13, 14, 18, 19, 21, 26, 27, 38, 39, 42, 54, 57, 63, 78, 91, 114, 117, 126, 133, 171, 182, 189, 229, 234, 247, 266, 273, 342, 351, 378, 399, 458, 494, 513, 546, 687, 702, 741, 798, 819, 1026, 1197, 1374, 1482, 1603, 1638, 1729, 2061, 2223, 2394, 2457, 2977, 3206, 3458, 3591, 4122, 4351, 4446, 4809, 4914, 5187, 5954, 6183, 6669, 7182, 8702, 8931, 9618, 10374, 12366, 13053, 13338, 14427, 15561, 17862, 20839, 26106, 26793, 28854, 30457, 31122, 39159, 41678, 43281, 46683, 53586, 56563, 60914, 62517, 78318, 80379, 86562, 91371, 93366, 113126, 117477, 125034, 160758, 169689, 182742, 187551, 234954, 274113, 339378, 375102, 395941, 509067, 548226, 562653, 791882, 822339, 1018134, 1125306, 1187823, 1527201, 1644678, 2375646, 3054402, 3563469, 7126938, 10690407, 21380814]

約数ペア:

[(1, 21380814), (2, 10690407), (3, 7126938), (6, 3563469), (7, 3054402), (9, 2375646), (13, 1644678), (14, 1527201), (18, 1187823), (19, 1125306), (21, 1018134), (26, 822339), (27, 791882), (38, 562653), (39, 548226), (42, 509067), (54, 395941), (57, 375102), (63, 339378), (78, 274113), (91, 234954), (114, 187551), (117, 182742), (126, 169689), (133, 160758), (171, 125034), (182, 117477), (189, 113126), (229, 93366), (234, 91371), (247, 86562), (266, 80379), (273, 78318), (342, 62517), (351, 60914), (378, 56563), (399, 53586), (458, 46683), (494, 43281), (513, 41678), (546, 39159), (687, 31122), (702, 30457), (741, 28854), (798, 26793), (819, 26106), (1026, 20839), (1197, 17862), (1374, 15561), (1482, 14427), (1603, 13338), (1638, 13053), (1729, 12366), (2061, 10374), (2223, 9618), (2394, 8931), (2457, 8702), (2977, 7182), (3206, 6669), (3458, 6183), (3591, 5954), (4122, 5187), (4351, 4914), (4446, 4809)]