21131420

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{55609}}^1$

素因数の和:55637

約数の個数: 24

約数和(自身を含む): 46712400

約数和(自身を除く): 25580980

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 76, 95, 190, 380, 55609, 111218, 222436, 278045, 556090, 1056571, 1112180, 2113142, 4226284, 5282855, 10565710, 21131420]

約数ペア:

[(1, 21131420), (2, 10565710), (4, 5282855), (5, 4226284), (10, 2113142), (19, 1112180), (20, 1056571), (38, 556090), (76, 278045), (95, 222436), (190, 111218), (380, 55609)]