17681980

素因数分解:

$2^2\times 5^1\times {\mathrm{109}}^1\times {\mathrm{8111}}^1$

素因数の和:8229

約数の個数: 24

約数和(自身を含む): 37477440

約数和(自身を除く): 19795460

約数列:

[1, 2, 4, 5, 10, 20, 109, 218, 436, 545, 1090, 2180, 8111, 16222, 32444, 40555, 81110, 162220, 884099, 1768198, 3536396, 4420495, 8840990, 17681980]

約数ペア:

[(1, 17681980), (2, 8840990), (4, 4420495), (5, 3536396), (10, 1768198), (20, 884099), (109, 162220), (218, 81110), (436, 40555), (545, 32444), (1090, 16222), (2180, 8111)]