28257640

素因数分解:

$2^3\times 5^1\times {\mathrm{37}}^1\times {\mathrm{61}}^1\times {\mathrm{313}}^1$

素因数の和:422

約数の個数: 64

約数和(自身を含む): 66580560

約数和(自身を除く): 38322920

約数列:

[1, 2, 4, 5, 8, 10, 20, 37, 40, 61, 74, 122, 148, 185, 244, 296, 305, 313, 370, 488, 610, 626, 740, 1220, 1252, 1480, 1565, 2257, 2440, 2504, 3130, 4514, 6260, 9028, 11285, 11581, 12520, 18056, 19093, 22570, 23162, 38186, 45140, 46324, 57905, 76372, 90280, 92648, 95465, 115810, 152744, 190930, 231620, 381860, 463240, 706441, 763720, 1412882, 2825764, 3532205, 5651528, 7064410, 14128820, 28257640]

約数ペア:

[(1, 28257640), (2, 14128820), (4, 7064410), (5, 5651528), (8, 3532205), (10, 2825764), (20, 1412882), (37, 763720), (40, 706441), (61, 463240), (74, 381860), (122, 231620), (148, 190930), (185, 152744), (244, 115810), (296, 95465), (305, 92648), (313, 90280), (370, 76372), (488, 57905), (610, 46324), (626, 45140), (740, 38186), (1220, 23162), (1252, 22570), (1480, 19093), (1565, 18056), (2257, 12520), (2440, 11581), (2504, 11285), (3130, 9028), (4514, 6260)]