389631920

素因数分解:

$2^4\times 5^1\times {\mathrm{233}}^1\times {\mathrm{20903}}^1$

素因数の和:21149

約数の個数: 40

約数和(自身を含む): 909825696

約数和(自身を除く): 520193776

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 233, 466, 932, 1165, 1864, 2330, 3728, 4660, 9320, 18640, 20903, 41806, 83612, 104515, 167224, 209030, 334448, 418060, 836120, 1672240, 4870399, 9740798, 19481596, 24351995, 38963192, 48703990, 77926384, 97407980, 194815960, 389631920]

約数ペア:

[(1, 389631920), (2, 194815960), (4, 97407980), (5, 77926384), (8, 48703990), (10, 38963192), (16, 24351995), (20, 19481596), (40, 9740798), (80, 4870399), (233, 1672240), (466, 836120), (932, 418060), (1165, 334448), (1864, 209030), (2330, 167224), (3728, 104515), (4660, 83612), (9320, 41806), (18640, 20903)]