128675420

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{207541}}^1$

素因数の和:207581

約数の個数: 24

約数和(自身を含む): 278936448

約数和(自身を除く): 150261028

約数列:

[1, 2, 4, 5, 10, 20, 31, 62, 124, 155, 310, 620, 207541, 415082, 830164, 1037705, 2075410, 4150820, 6433771, 12867542, 25735084, 32168855, 64337710, 128675420]

約数ペア:

[(1, 128675420), (2, 64337710), (4, 32168855), (5, 25735084), (10, 12867542), (20, 6433771), (31, 4150820), (62, 2075410), (124, 1037705), (155, 830164), (310, 415082), (620, 207541)]