51429680

素因数分解:

$2^4\times 5^1\times {\mathrm{642871}}^1$

素因数の和:642884

約数の個数: 20

約数和(自身を含む): 119574192

約数和(自身を除く): 68144512

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 642871, 1285742, 2571484, 3214355, 5142968, 6428710, 10285936, 12857420, 25714840, 51429680]

約数ペア:

[(1, 51429680), (2, 25714840), (4, 12857420), (5, 10285936), (8, 6428710), (10, 5142968), (16, 3214355), (20, 2571484), (40, 1285742), (80, 642871)]