18751640

素因数分解:

$2^3\times 5^1\times {\mathrm{571}}^1\times {\mathrm{821}}^1$

素因数の和:1403

約数の個数: 32

約数和(自身を含む): 42316560

約数和(自身を除く): 23564920

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 571, 821, 1142, 1642, 2284, 2855, 3284, 4105, 4568, 5710, 6568, 8210, 11420, 16420, 22840, 32840, 468791, 937582, 1875164, 2343955, 3750328, 4687910, 9375820, 18751640]

約数ペア:

[(1, 18751640), (2, 9375820), (4, 4687910), (5, 3750328), (8, 2343955), (10, 1875164), (20, 937582), (40, 468791), (571, 32840), (821, 22840), (1142, 16420), (1642, 11420), (2284, 8210), (2855, 6568), (3284, 5710), (4105, 4568)]