21665631

素因数分解:

$3^1\times {\mathrm{13}}^2\times {\mathrm{151}}^1\times {\mathrm{283}}^1$

素因数の和:463

約数の個数: 24

約数和(自身を含む): 31598976

約数和(自身を除く): 9933345

約数列:

[1, 3, 13, 39, 151, 169, 283, 453, 507, 849, 1963, 3679, 5889, 11037, 25519, 42733, 47827, 76557, 128199, 143481, 555529, 1666587, 7221877, 21665631]

約数ペア:

[(1, 21665631), (3, 7221877), (13, 1666587), (39, 555529), (151, 143481), (169, 128199), (283, 76557), (453, 47827), (507, 42733), (849, 25519), (1963, 11037), (3679, 5889)]