18063820

素因数分解:

$2^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{12721}}^1$

素因数の和:12801

約数の個数: 24

約数和(自身を含む): 38471328

約数和(自身を除く): 20407508

約数列:

[1, 2, 4, 5, 10, 20, 71, 142, 284, 355, 710, 1420, 12721, 25442, 50884, 63605, 127210, 254420, 903191, 1806382, 3612764, 4515955, 9031910, 18063820]

約数ペア:

[(1, 18063820), (2, 9031910), (4, 4515955), (5, 3612764), (10, 1806382), (20, 903191), (71, 254420), (142, 127210), (284, 63605), (355, 50884), (710, 25442), (1420, 12721)]