20880560

素因数分解:

$2^4\times 5^1\times {\mathrm{211}}^1\times {\mathrm{1237}}^1$

素因数の和:1461

約数の個数: 40

約数和(自身を含む): 48816816

約数和(自身を除く): 27936256

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 211, 422, 844, 1055, 1237, 1688, 2110, 2474, 3376, 4220, 4948, 6185, 8440, 9896, 12370, 16880, 19792, 24740, 49480, 98960, 261007, 522014, 1044028, 1305035, 2088056, 2610070, 4176112, 5220140, 10440280, 20880560]

約数ペア:

[(1, 20880560), (2, 10440280), (4, 5220140), (5, 4176112), (8, 2610070), (10, 2088056), (16, 1305035), (20, 1044028), (40, 522014), (80, 261007), (211, 98960), (422, 49480), (844, 24740), (1055, 19792), (1237, 16880), (1688, 12370), (2110, 9896), (2474, 8440), (3376, 6185), (4220, 4948)]