21851249

素因数分解:

$7^1\times {\mathrm{31}}^1\times {\mathrm{101}}^1\times {\mathrm{997}}^1$

素因数の和:1136

約数の個数: 16

約数和(自身を含む): 26059776

約数和(自身を除く): 4208527

約数列:

[1, 7, 31, 101, 217, 707, 997, 3131, 6979, 21917, 30907, 100697, 216349, 704879, 3121607, 21851249]

約数ペア:

[(1, 21851249), (7, 3121607), (31, 704879), (101, 216349), (217, 100697), (707, 30907), (997, 21917), (3131, 6979)]