18899420

素因数分解:

$2^2\times 5^1\times {\mathrm{821}}^1\times {\mathrm{1151}}^1$

素因数の和:1981

約数の個数: 24

約数和(自身を含む): 39771648

約数和(自身を除く): 20872228

約数列:

[1, 2, 4, 5, 10, 20, 821, 1151, 1642, 2302, 3284, 4105, 4604, 5755, 8210, 11510, 16420, 23020, 944971, 1889942, 3779884, 4724855, 9449710, 18899420]

約数ペア:

[(1, 18899420), (2, 9449710), (4, 4724855), (5, 3779884), (10, 1889942), (20, 944971), (821, 23020), (1151, 16420), (1642, 11510), (2302, 8210), (3284, 5755), (4105, 4604)]