21640671

素因数分解:

$3^2\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{4999}}^1$

素因数の和:5055

約数の個数: 24

約数和(自身を含む): 34580000

約数和(自身を除く): 12939329

約数列:

[1, 3, 9, 13, 37, 39, 111, 117, 333, 481, 1443, 4329, 4999, 14997, 44991, 64987, 184963, 194961, 554889, 584883, 1664667, 2404519, 7213557, 21640671]

約数ペア:

[(1, 21640671), (3, 7213557), (9, 2404519), (13, 1664667), (37, 584883), (39, 554889), (111, 194961), (117, 184963), (333, 64987), (481, 44991), (1443, 14997), (4329, 4999)]