648632020

素因数分解:

$2^2\times 5^1\times {\mathrm{53}}^1\times {\mathrm{257}}^1\times {\mathrm{2381}}^1$

素因数の和:2700

約数の個数: 48

約数和(自身を含む): 1393813008

約数和(自身を除く): 745180988

約数列:

[1, 2, 4, 5, 10, 20, 53, 106, 212, 257, 265, 514, 530, 1028, 1060, 1285, 2381, 2570, 4762, 5140, 9524, 11905, 13621, 23810, 27242, 47620, 54484, 68105, 126193, 136210, 252386, 272420, 504772, 611917, 630965, 1223834, 1261930, 2447668, 2523860, 3059585, 6119170, 12238340, 32431601, 64863202, 129726404, 162158005, 324316010, 648632020]

約数ペア:

[(1, 648632020), (2, 324316010), (4, 162158005), (5, 129726404), (10, 64863202), (20, 32431601), (53, 12238340), (106, 6119170), (212, 3059585), (257, 2523860), (265, 2447668), (514, 1261930), (530, 1223834), (1028, 630965), (1060, 611917), (1285, 504772), (2381, 272420), (2570, 252386), (4762, 136210), (5140, 126193), (9524, 68105), (11905, 54484), (13621, 47620), (23810, 27242)]