21685240

素因数分解:

$2^3\times 5^1\times {\mathrm{542131}}^1$

素因数の和:542142

約数の個数: 16

約数和(自身を含む): 48791880

約数和(自身を除く): 27106640

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 542131, 1084262, 2168524, 2710655, 4337048, 5421310, 10842620, 21685240]

約数ペア:

[(1, 21685240), (2, 10842620), (4, 5421310), (5, 4337048), (8, 2710655), (10, 2168524), (20, 1084262), (40, 542131)]