31911280

素因数分解:

$2^4\times 5^1\times {\mathrm{239}}^1\times {\mathrm{1669}}^1$

素因数の和:1921

約数の個数: 40

約数和(自身を含む): 74548800

約数和(自身を除く): 42637520

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 239, 478, 956, 1195, 1669, 1912, 2390, 3338, 3824, 4780, 6676, 8345, 9560, 13352, 16690, 19120, 26704, 33380, 66760, 133520, 398891, 797782, 1595564, 1994455, 3191128, 3988910, 6382256, 7977820, 15955640, 31911280]

約数ペア:

[(1, 31911280), (2, 15955640), (4, 7977820), (5, 6382256), (8, 3988910), (10, 3191128), (16, 1994455), (20, 1595564), (40, 797782), (80, 398891), (239, 133520), (478, 66760), (956, 33380), (1195, 26704), (1669, 19120), (1912, 16690), (2390, 13352), (3338, 9560), (3824, 8345), (4780, 6676)]