20791491

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{107}}^1\times {\mathrm{487}}^1$

素因数の和:623

約数の個数: 32

約数和(自身を含む): 33730560

約数和(自身を除く): 12939069

約数列:

[1, 3, 7, 19, 21, 57, 107, 133, 321, 399, 487, 749, 1461, 2033, 2247, 3409, 6099, 9253, 10227, 14231, 27759, 42693, 52109, 64771, 156327, 194313, 364763, 990071, 1094289, 2970213, 6930497, 20791491]

約数ペア:

[(1, 20791491), (3, 6930497), (7, 2970213), (19, 1094289), (21, 990071), (57, 364763), (107, 194313), (133, 156327), (321, 64771), (399, 52109), (487, 42693), (749, 27759), (1461, 14231), (2033, 10227), (2247, 9253), (3409, 6099)]