31439960

素因数分解:

$2^3\times 5^1\times {\mathrm{109}}^1\times {\mathrm{7211}}^1$

素因数の和:7331

約数の個数: 32

約数和(自身を含む): 71398800

約数和(自身を除く): 39958840

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 109, 218, 436, 545, 872, 1090, 2180, 4360, 7211, 14422, 28844, 36055, 57688, 72110, 144220, 288440, 785999, 1571998, 3143996, 3929995, 6287992, 7859990, 15719980, 31439960]

約数ペア:

[(1, 31439960), (2, 15719980), (4, 7859990), (5, 6287992), (8, 3929995), (10, 3143996), (20, 1571998), (40, 785999), (109, 288440), (218, 144220), (436, 72110), (545, 57688), (872, 36055), (1090, 28844), (2180, 14422), (4360, 7211)]