21085953

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{43}}^1\times {\mathrm{1229}}^1$

素因数の和:1301

約数の個数: 32

約数和(自身を含む): 34636800

約数和(自身を除く): 13550847

約数列:

[1, 3, 7, 19, 21, 43, 57, 129, 133, 301, 399, 817, 903, 1229, 2451, 3687, 5719, 8603, 17157, 23351, 25809, 52847, 70053, 158541, 163457, 369929, 490371, 1004093, 1109787, 3012279, 7028651, 21085953]

約数ペア:

[(1, 21085953), (3, 7028651), (7, 3012279), (19, 1109787), (21, 1004093), (43, 490371), (57, 369929), (129, 163457), (133, 158541), (301, 70053), (399, 52847), (817, 25809), (903, 23351), (1229, 17157), (2451, 8603), (3687, 5719)]