128680520

素因数分解:

$2^3\times 5^1\times {\mathrm{191}}^1\times {\mathrm{16843}}^1$

素因数の和:17045

約数の個数: 32

約数和(自身を含む): 291064320

約数和(自身を除く): 162383800

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 191, 382, 764, 955, 1528, 1910, 3820, 7640, 16843, 33686, 67372, 84215, 134744, 168430, 336860, 673720, 3217013, 6434026, 12868052, 16085065, 25736104, 32170130, 64340260, 128680520]

約数ペア:

[(1, 128680520), (2, 64340260), (4, 32170130), (5, 25736104), (8, 16085065), (10, 12868052), (20, 6434026), (40, 3217013), (191, 673720), (382, 336860), (764, 168430), (955, 134744), (1528, 84215), (1910, 67372), (3820, 33686), (7640, 16843)]