21215656

素因数分解:

$2^3\times 7^1\times {\mathrm{11}}^2\times {\mathrm{31}}^1\times {\mathrm{101}}^1$

素因数の和:167

約数の個数: 96

約数和(自身を含む): 52093440

約数和(自身を除く): 30877784

約数列:

[1, 2, 4, 7, 8, 11, 14, 22, 28, 31, 44, 56, 62, 77, 88, 101, 121, 124, 154, 202, 217, 242, 248, 308, 341, 404, 434, 484, 616, 682, 707, 808, 847, 868, 968, 1111, 1364, 1414, 1694, 1736, 2222, 2387, 2728, 2828, 3131, 3388, 3751, 4444, 4774, 5656, 6262, 6776, 7502, 7777, 8888, 9548, 12221, 12524, 15004, 15554, 19096, 21917, 24442, 25048, 26257, 30008, 31108, 34441, 43834, 48884, 52514, 62216, 68882, 85547, 87668, 97768, 105028, 137764, 171094, 175336, 210056, 241087, 275528, 342188, 378851, 482174, 684376, 757702, 964348, 1515404, 1928696, 2651957, 3030808, 5303914, 10607828, 21215656]

約数ペア:

[(1, 21215656), (2, 10607828), (4, 5303914), (7, 3030808), (8, 2651957), (11, 1928696), (14, 1515404), (22, 964348), (28, 757702), (31, 684376), (44, 482174), (56, 378851), (62, 342188), (77, 275528), (88, 241087), (101, 210056), (121, 175336), (124, 171094), (154, 137764), (202, 105028), (217, 97768), (242, 87668), (248, 85547), (308, 68882), (341, 62216), (404, 52514), (434, 48884), (484, 43834), (616, 34441), (682, 31108), (707, 30008), (808, 26257), (847, 25048), (868, 24442), (968, 21917), (1111, 19096), (1364, 15554), (1414, 15004), (1694, 12524), (1736, 12221), (2222, 9548), (2387, 8888), (2728, 7777), (2828, 7502), (3131, 6776), (3388, 6262), (3751, 5656), (4444, 4774)]