217154920

素因数分解:

$2^3\times 5^1\times {\mathrm{71}}^1\times {\mathrm{76463}}^1$

素因数の和:76545

約数の個数: 32

約数和(自身を含む): 495486720

約数和(自身を除く): 278331800

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 71, 142, 284, 355, 568, 710, 1420, 2840, 76463, 152926, 305852, 382315, 611704, 764630, 1529260, 3058520, 5428873, 10857746, 21715492, 27144365, 43430984, 54288730, 108577460, 217154920]

約数ペア:

[(1, 217154920), (2, 108577460), (4, 54288730), (5, 43430984), (8, 27144365), (10, 21715492), (20, 10857746), (40, 5428873), (71, 3058520), (142, 1529260), (284, 764630), (355, 611704), (568, 382315), (710, 305852), (1420, 152926), (2840, 76463)]