21320964

素因数分解:

$2^2\times 3^2\times 7^1\times {\mathrm{19}}^1\times {\mathrm{61}}^1\times {\mathrm{73}}^1$

素因数の和:170

約数の個数: 144

約数和(自身を含む): 66801280

約数和(自身を除く): 45480316

約数列:

[1, 2, 3, 4, 6, 7, 9, 12, 14, 18, 19, 21, 28, 36, 38, 42, 57, 61, 63, 73, 76, 84, 114, 122, 126, 133, 146, 171, 183, 219, 228, 244, 252, 266, 292, 342, 366, 399, 427, 438, 511, 532, 549, 657, 684, 732, 798, 854, 876, 1022, 1098, 1159, 1197, 1281, 1314, 1387, 1533, 1596, 1708, 2044, 2196, 2318, 2394, 2562, 2628, 2774, 3066, 3477, 3843, 4161, 4453, 4599, 4636, 4788, 5124, 5548, 6132, 6954, 7686, 8113, 8322, 8906, 9198, 9709, 10431, 12483, 13359, 13908, 15372, 16226, 16644, 17812, 18396, 19418, 20862, 24339, 24966, 26718, 29127, 31171, 32452, 38836, 40077, 41724, 48678, 49932, 53436, 58254, 62342, 73017, 80154, 84607, 87381, 93513, 97356, 116508, 124684, 146034, 160308, 169214, 174762, 187026, 253821, 280539, 292068, 338428, 349524, 374052, 507642, 561078, 592249, 761463, 1015284, 1122156, 1184498, 1522926, 1776747, 2368996, 3045852, 3553494, 5330241, 7106988, 10660482, 21320964]

約数ペア:

[(1, 21320964), (2, 10660482), (3, 7106988), (4, 5330241), (6, 3553494), (7, 3045852), (9, 2368996), (12, 1776747), (14, 1522926), (18, 1184498), (19, 1122156), (21, 1015284), (28, 761463), (36, 592249), (38, 561078), (42, 507642), (57, 374052), (61, 349524), (63, 338428), (73, 292068), (76, 280539), (84, 253821), (114, 187026), (122, 174762), (126, 169214), (133, 160308), (146, 146034), (171, 124684), (183, 116508), (219, 97356), (228, 93513), (244, 87381), (252, 84607), (266, 80154), (292, 73017), (342, 62342), (366, 58254), (399, 53436), (427, 49932), (438, 48678), (511, 41724), (532, 40077), (549, 38836), (657, 32452), (684, 31171), (732, 29127), (798, 26718), (854, 24966), (876, 24339), (1022, 20862), (1098, 19418), (1159, 18396), (1197, 17812), (1281, 16644), (1314, 16226), (1387, 15372), (1533, 13908), (1596, 13359), (1708, 12483), (2044, 10431), (2196, 9709), (2318, 9198), (2394, 8906), (2562, 8322), (2628, 8113), (2774, 7686), (3066, 6954), (3477, 6132), (3843, 5548), (4161, 5124), (4453, 4788), (4599, 4636)]