31264720

素因数分解:

$2^4\times 5^1\times {\mathrm{390809}}^1$

素因数の和:390822

約数の個数: 20

約数和(自身を含む): 72690660

約数和(自身を除く): 41425940

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 390809, 781618, 1563236, 1954045, 3126472, 3908090, 6252944, 7816180, 15632360, 31264720]

約数ペア:

[(1, 31264720), (2, 15632360), (4, 7816180), (5, 6252944), (8, 3908090), (10, 3126472), (16, 1954045), (20, 1563236), (40, 781618), (80, 390809)]