31288240

素因数分解:

$2^4\times 5^1\times {\mathrm{391103}}^1$

素因数の和:391116

約数の個数: 20

約数和(自身を含む): 72745344

約数和(自身を除く): 41457104

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 391103, 782206, 1564412, 1955515, 3128824, 3911030, 6257648, 7822060, 15644120, 31288240]

約数ペア:

[(1, 31288240), (2, 15644120), (4, 7822060), (5, 6257648), (8, 3911030), (10, 3128824), (16, 1955515), (20, 1564412), (40, 782206), (80, 391103)]