20721351

素因数分解:

$3^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{58043}}^1$

素因数の和:58070

約数の個数: 16

約数和(自身を含む): 33433344

約数和(自身を除く): 12711993

約数列:

[1, 3, 7, 17, 21, 51, 119, 357, 58043, 174129, 406301, 986731, 1218903, 2960193, 6907117, 20721351]

約数ペア:

[(1, 20721351), (3, 6907117), (7, 2960193), (17, 1218903), (21, 986731), (51, 406301), (119, 174129), (357, 58043)]