20390140

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{59971}}^1$

素因数の和:59997

約数の個数: 24

約数和(自身を含む): 45338832

約数和(自身を除く): 24948692

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 68, 85, 170, 340, 59971, 119942, 239884, 299855, 599710, 1019507, 1199420, 2039014, 4078028, 5097535, 10195070, 20390140]

約数ペア:

[(1, 20390140), (2, 10195070), (4, 5097535), (5, 4078028), (10, 2039014), (17, 1199420), (20, 1019507), (34, 599710), (68, 299855), (85, 239884), (170, 119942), (340, 59971)]