18787940

素因数分解:

$2^2\times 5^1\times {\mathrm{29}}^2\times {\mathrm{1117}}^1$

素因数の和:1184

約数の個数: 36

約数和(自身を含む): 40898676

約数和(自身を除く): 22110736

約数列:

[1, 2, 4, 5, 10, 20, 29, 58, 116, 145, 290, 580, 841, 1117, 1682, 2234, 3364, 4205, 4468, 5585, 8410, 11170, 16820, 22340, 32393, 64786, 129572, 161965, 323930, 647860, 939397, 1878794, 3757588, 4696985, 9393970, 18787940]

約数ペア:

[(1, 18787940), (2, 9393970), (4, 4696985), (5, 3757588), (10, 1878794), (20, 939397), (29, 647860), (58, 323930), (116, 161965), (145, 129572), (290, 64786), (580, 32393), (841, 22340), (1117, 16820), (1682, 11170), (2234, 8410), (3364, 5585), (4205, 4468)]