21004540

素因数分解:

$2^2\times 5^1\times {\mathrm{131}}^1\times {\mathrm{8017}}^1$

素因数の和:8157

約数の個数: 24

約数和(自身を含む): 44451792

約数和(自身を除く): 23447252

約数列:

[1, 2, 4, 5, 10, 20, 131, 262, 524, 655, 1310, 2620, 8017, 16034, 32068, 40085, 80170, 160340, 1050227, 2100454, 4200908, 5251135, 10502270, 21004540]

約数ペア:

[(1, 21004540), (2, 10502270), (4, 5251135), (5, 4200908), (10, 2100454), (20, 1050227), (131, 160340), (262, 80170), (524, 40085), (655, 32068), (1310, 16034), (2620, 8017)]