19985679

素因数分解:

$3^2\times 7^2\times {\mathrm{45319}}^1$

素因数の和:45339

約数の個数: 18

約数和(自身を含む): 33582120

約数和(自身を除く): 13596441

約数列:

[1, 3, 7, 9, 21, 49, 63, 147, 441, 45319, 135957, 317233, 407871, 951699, 2220631, 2855097, 6661893, 19985679]

約数ペア:

[(1, 19985679), (3, 6661893), (7, 2855097), (9, 2220631), (21, 951699), (49, 407871), (63, 317233), (147, 135957), (441, 45319)]