318684920

素因数分解:

$2^3\times 5^1\times {\mathrm{71}}^1\times {\mathrm{112213}}^1$

素因数の和:112295

約数の個数: 32

約数和(自身を含む): 727146720

約数和(自身を除く): 408461800

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 71, 142, 284, 355, 568, 710, 1420, 2840, 112213, 224426, 448852, 561065, 897704, 1122130, 2244260, 4488520, 7967123, 15934246, 31868492, 39835615, 63736984, 79671230, 159342460, 318684920]

約数ペア:

[(1, 318684920), (2, 159342460), (4, 79671230), (5, 63736984), (8, 39835615), (10, 31868492), (20, 15934246), (40, 7967123), (71, 4488520), (142, 2244260), (284, 1122130), (355, 897704), (568, 561065), (710, 448852), (1420, 224426), (2840, 112213)]