21754473

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{139}}^1\times {\mathrm{4013}}^1$

素因数の和:4168

約数の個数: 16

約数和(自身を含む): 31469760

約数和(自身を除く): 9715287

約数列:

[1, 3, 13, 39, 139, 417, 1807, 4013, 5421, 12039, 52169, 156507, 557807, 1673421, 7251491, 21754473]

約数ペア:

[(1, 21754473), (3, 7251491), (13, 1673421), (39, 557807), (139, 156507), (417, 52169), (1807, 12039), (4013, 5421)]