8706920

素因数分解:

$2^3\times 5^1\times {\mathrm{109}}^1\times {\mathrm{1997}}^1$

素因数の和:2117

約数の個数: 32

約数和(自身を含む): 19780200

約数和(自身を除く): 11073280

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 109, 218, 436, 545, 872, 1090, 1997, 2180, 3994, 4360, 7988, 9985, 15976, 19970, 39940, 79880, 217673, 435346, 870692, 1088365, 1741384, 2176730, 4353460, 8706920]

約数ペア:

[(1, 8706920), (2, 4353460), (4, 2176730), (5, 1741384), (8, 1088365), (10, 870692), (20, 435346), (40, 217673), (109, 79880), (218, 39940), (436, 19970), (545, 15976), (872, 9985), (1090, 7988), (1997, 4360), (2180, 3994)]