21990843

素因数分解:

$3^2\times 7^1\times {\mathrm{17}}^1\times {\mathrm{20533}}^1$

素因数の和:20563

約数の個数: 24

約数和(自身を含む): 38439648

約数和(自身を除く): 16448805

約数列:

[1, 3, 7, 9, 17, 21, 51, 63, 119, 153, 357, 1071, 20533, 61599, 143731, 184797, 349061, 431193, 1047183, 1293579, 2443427, 3141549, 7330281, 21990843]

約数ペア:

[(1, 21990843), (3, 7330281), (7, 3141549), (9, 2443427), (17, 1293579), (21, 1047183), (51, 431193), (63, 349061), (119, 184797), (153, 143731), (357, 61599), (1071, 20533)]