18278813

素因数分解:

$7^4\times {\mathrm{23}}^1\times {\mathrm{331}}^1$

素因数の和:382

約数の個数: 20

約数和(自身を含む): 22318368

約数和(自身を除く): 4039555

約数列:

[1, 7, 23, 49, 161, 331, 343, 1127, 2317, 2401, 7613, 7889, 16219, 53291, 55223, 113533, 373037, 794731, 2611259, 18278813]

約数ペア:

[(1, 18278813), (7, 2611259), (23, 794731), (49, 373037), (161, 113533), (331, 55223), (343, 53291), (1127, 16219), (2317, 7889), (2401, 7613)]