21719943

素因数分解:

$3^2\times 7^1\times {\mathrm{307}}^1\times {\mathrm{1123}}^1$

素因数の和:1443

約数の個数: 24

約数和(自身を含む): 36003968

約数和(自身を除く): 14284025

約数列:

[1, 3, 7, 9, 21, 63, 307, 921, 1123, 2149, 2763, 3369, 6447, 7861, 10107, 19341, 23583, 70749, 344761, 1034283, 2413327, 3102849, 7239981, 21719943]

約数ペア:

[(1, 21719943), (3, 7239981), (7, 3102849), (9, 2413327), (21, 1034283), (63, 344761), (307, 70749), (921, 23583), (1123, 19341), (2149, 10107), (2763, 7861), (3369, 6447)]