21972940

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{99877}}^1$

素因数の和:99897

約数の個数: 24

約数和(自身を含む): 50338512

約数和(自身を除く): 28365572

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 220, 99877, 199754, 399508, 499385, 998770, 1098647, 1997540, 2197294, 4394588, 5493235, 10986470, 21972940]

約数ペア:

[(1, 21972940), (2, 10986470), (4, 5493235), (5, 4394588), (10, 2197294), (11, 1997540), (20, 1098647), (22, 998770), (44, 499385), (55, 399508), (110, 199754), (220, 99877)]