21563871

素因数分解:

$3^1\times 7^2\times {\mathrm{17}}^1\times {\mathrm{8629}}^1$

素因数の和:8663

約数の個数: 24

約数和(自身を含む): 35417520

約数和(自身を除く): 13853649

約数列:

[1, 3, 7, 17, 21, 49, 51, 119, 147, 357, 833, 2499, 8629, 25887, 60403, 146693, 181209, 422821, 440079, 1026851, 1268463, 3080553, 7187957, 21563871]

約数ペア:

[(1, 21563871), (3, 7187957), (7, 3080553), (17, 1268463), (21, 1026851), (49, 440079), (51, 422821), (119, 181209), (147, 146693), (357, 60403), (833, 25887), (2499, 8629)]