18398863

素因数分解:

$7^4\times {\mathrm{79}}^1\times {\mathrm{97}}^1$

素因数の和:204

約数の個数: 20

約数和(自身を含む): 21959840

約数和(自身を除く): 3560977

約数列:

[1, 7, 49, 79, 97, 343, 553, 679, 2401, 3871, 4753, 7663, 27097, 33271, 53641, 189679, 232897, 375487, 2628409, 18398863]

約数ペア:

[(1, 18398863), (7, 2628409), (49, 375487), (79, 232897), (97, 189679), (343, 53641), (553, 33271), (679, 27097), (2401, 7663), (3871, 4753)]