21287874

素因数分解:

$2^1\times 3^1\times {\mathrm{53}}^1\times {\mathrm{66943}}^1$

素因数の和:67001

約数の個数: 16

約数和(自身を含む): 43379712

約数和(自身を除く): 22091838

約数列:

[1, 2, 3, 6, 53, 106, 159, 318, 66943, 133886, 200829, 401658, 3547979, 7095958, 10643937, 21287874]

約数ペア:

[(1, 21287874), (2, 10643937), (3, 7095958), (6, 3547979), (53, 401658), (106, 200829), (159, 133886), (318, 66943)]