21735428

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{13}}^2\times {\mathrm{37}}^1\times {\mathrm{79}}^1$

素因数の和:157

約数の個数: 72

約数和(自身を含む): 46730880

約数和(自身を除く): 24995452

約数列:

[1, 2, 4, 11, 13, 22, 26, 37, 44, 52, 74, 79, 143, 148, 158, 169, 286, 316, 338, 407, 481, 572, 676, 814, 869, 962, 1027, 1628, 1738, 1859, 1924, 2054, 2923, 3476, 3718, 4108, 5291, 5846, 6253, 7436, 10582, 11297, 11692, 12506, 13351, 21164, 22594, 25012, 26702, 32153, 37999, 45188, 53404, 64306, 68783, 75998, 128612, 137566, 146861, 151996, 275132, 293722, 417989, 493987, 587444, 835978, 987974, 1671956, 1975948, 5433857, 10867714, 21735428]

約数ペア:

[(1, 21735428), (2, 10867714), (4, 5433857), (11, 1975948), (13, 1671956), (22, 987974), (26, 835978), (37, 587444), (44, 493987), (52, 417989), (74, 293722), (79, 275132), (143, 151996), (148, 146861), (158, 137566), (169, 128612), (286, 75998), (316, 68783), (338, 64306), (407, 53404), (481, 45188), (572, 37999), (676, 32153), (814, 26702), (869, 25012), (962, 22594), (1027, 21164), (1628, 13351), (1738, 12506), (1859, 11692), (1924, 11297), (2054, 10582), (2923, 7436), (3476, 6253), (3718, 5846), (4108, 5291)]