21565240

素因数分解:

$2^3\times 5^1\times {\mathrm{443}}^1\times {\mathrm{1217}}^1$

素因数の和:1671

約数の個数: 32

約数和(自身を含む): 48671280

約数和(自身を除く): 27106040

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 443, 886, 1217, 1772, 2215, 2434, 3544, 4430, 4868, 6085, 8860, 9736, 12170, 17720, 24340, 48680, 539131, 1078262, 2156524, 2695655, 4313048, 5391310, 10782620, 21565240]

約数ペア:

[(1, 21565240), (2, 10782620), (4, 5391310), (5, 4313048), (8, 2695655), (10, 2156524), (20, 1078262), (40, 539131), (443, 48680), (886, 24340), (1217, 17720), (1772, 12170), (2215, 9736), (2434, 8860), (3544, 6085), (4430, 4868)]