21793947

素因数分解:

$3^1\times 7^1\times {\mathrm{47}}^1\times {\mathrm{71}}^1\times {\mathrm{311}}^1$

素因数の和:439

約数の個数: 32

約数和(自身を含む): 34504704

約数和(自身を除く): 12710757

約数列:

[1, 3, 7, 21, 47, 71, 141, 213, 311, 329, 497, 933, 987, 1491, 2177, 3337, 6531, 10011, 14617, 22081, 23359, 43851, 66243, 70077, 102319, 154567, 306957, 463701, 1037807, 3113421, 7264649, 21793947]

約数ペア:

[(1, 21793947), (3, 7264649), (7, 3113421), (21, 1037807), (47, 463701), (71, 306957), (141, 154567), (213, 102319), (311, 70077), (329, 66243), (497, 43851), (933, 23359), (987, 22081), (1491, 14617), (2177, 10011), (3337, 6531)]