31315280

素因数分解:

$2^4\times 5^1\times {\mathrm{391441}}^1$

素因数の和:391454

約数の個数: 20

約数和(自身を含む): 72808212

約数和(自身を除く): 41492932

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 391441, 782882, 1565764, 1957205, 3131528, 3914410, 6263056, 7828820, 15657640, 31315280]

約数ペア:

[(1, 31315280), (2, 15657640), (4, 7828820), (5, 6263056), (8, 3914410), (10, 3131528), (16, 1957205), (20, 1565764), (40, 782882), (80, 391441)]