19790840

素因数分解:

$2^3\times 5^1\times {\mathrm{61}}^1\times {\mathrm{8111}}^1$

素因数の和:8183

約数の個数: 32

約数和(自身を含む): 45264960

約数和(自身を除く): 25474120

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 61, 122, 244, 305, 488, 610, 1220, 2440, 8111, 16222, 32444, 40555, 64888, 81110, 162220, 324440, 494771, 989542, 1979084, 2473855, 3958168, 4947710, 9895420, 19790840]

約数ペア:

[(1, 19790840), (2, 9895420), (4, 4947710), (5, 3958168), (8, 2473855), (10, 1979084), (20, 989542), (40, 494771), (61, 324440), (122, 162220), (244, 81110), (305, 64888), (488, 40555), (610, 32444), (1220, 16222), (2440, 8111)]