25907120

素因数分解:

$2^4\times 5^1\times {\mathrm{109}}^1\times {\mathrm{2971}}^1$

素因数の和:3093

約数の個数: 40

約数和(自身を含む): 60807120

約数和(自身を除く): 34900000

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 109, 218, 436, 545, 872, 1090, 1744, 2180, 2971, 4360, 5942, 8720, 11884, 14855, 23768, 29710, 47536, 59420, 118840, 237680, 323839, 647678, 1295356, 1619195, 2590712, 3238390, 5181424, 6476780, 12953560, 25907120]

約数ペア:

[(1, 25907120), (2, 12953560), (4, 6476780), (5, 5181424), (8, 3238390), (10, 2590712), (16, 1619195), (20, 1295356), (40, 647678), (80, 323839), (109, 237680), (218, 118840), (436, 59420), (545, 47536), (872, 29710), (1090, 23768), (1744, 14855), (2180, 11884), (2971, 8720), (4360, 5942)]