31421560

素因数分解:

$2^3\times 5^1\times {\mathrm{809}}^1\times {\mathrm{971}}^1$

素因数の和:1791

約数の個数: 32

約数和(自身を含む): 70858800

約数和(自身を除く): 39437240

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 809, 971, 1618, 1942, 3236, 3884, 4045, 4855, 6472, 7768, 8090, 9710, 16180, 19420, 32360, 38840, 785539, 1571078, 3142156, 3927695, 6284312, 7855390, 15710780, 31421560]

約数ペア:

[(1, 31421560), (2, 15710780), (4, 7855390), (5, 6284312), (8, 3927695), (10, 3142156), (20, 1571078), (40, 785539), (809, 38840), (971, 32360), (1618, 19420), (1942, 16180), (3236, 9710), (3884, 8090), (4045, 7768), (4855, 6472)]