19881729

素因数分解:

$3^2\times 7^1\times {\mathrm{23}}^1\times {\mathrm{13721}}^1$

素因数の和:13757

約数の個数: 24

約数和(自身を含む): 34250112

約数和(自身を除く): 14368383

約数列:

[1, 3, 7, 9, 21, 23, 63, 69, 161, 207, 483, 1449, 13721, 41163, 96047, 123489, 288141, 315583, 864423, 946749, 2209081, 2840247, 6627243, 19881729]

約数ペア:

[(1, 19881729), (3, 6627243), (7, 2840247), (9, 2209081), (21, 946749), (23, 864423), (63, 315583), (69, 288141), (161, 123489), (207, 96047), (483, 41163), (1449, 13721)]