21130280

素因数分解:

$2^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{27803}}^1$

素因数の和:27833

約数の個数: 32

約数和(自身を含む): 50047200

約数和(自身を除く): 28916920

約数列:

[1, 2, 4, 5, 8, 10, 19, 20, 38, 40, 76, 95, 152, 190, 380, 760, 27803, 55606, 111212, 139015, 222424, 278030, 528257, 556060, 1056514, 1112120, 2113028, 2641285, 4226056, 5282570, 10565140, 21130280]

約数ペア:

[(1, 21130280), (2, 10565140), (4, 5282570), (5, 4226056), (8, 2641285), (10, 2113028), (19, 1112120), (20, 1056514), (38, 556060), (40, 528257), (76, 278030), (95, 222424), (152, 139015), (190, 111212), (380, 55606), (760, 27803)]