21920241

素因数分解:

$3^1\times 7^1\times {\mathrm{353}}^1\times {\mathrm{2957}}^1$

素因数の和:3320

約数の個数: 16

約数和(自身を含む): 33508224

約数和(自身を除く): 11587983

約数列:

[1, 3, 7, 21, 353, 1059, 2471, 2957, 7413, 8871, 20699, 62097, 1043821, 3131463, 7306747, 21920241]

約数ペア:

[(1, 21920241), (3, 7306747), (7, 3131463), (21, 1043821), (353, 62097), (1059, 20699), (2471, 8871), (2957, 7413)]