643240

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{1237}}^1$

素因数の和:1261

約数の個数: 32

約数和(自身を含む): 1559880

約数和(自身を除く): 916640

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 260, 520, 1237, 2474, 4948, 6185, 9896, 12370, 16081, 24740, 32162, 49480, 64324, 80405, 128648, 160810, 321620, 643240]

約数ペア:

[(1, 643240), (2, 321620), (4, 160810), (5, 128648), (8, 80405), (10, 64324), (13, 49480), (20, 32162), (26, 24740), (40, 16081), (52, 12370), (65, 9896), (104, 6185), (130, 4948), (260, 2474), (520, 1237)]