17921813

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{6353}}^1$

素因数の和:6404

約数の個数: 16

約数和(自身を含む): 22772736

約数和(自身を除く): 4850923

約数列:

[1, 7, 13, 31, 91, 217, 403, 2821, 6353, 44471, 82589, 196943, 578123, 1378601, 2560259, 17921813]

約数ペア:

[(1, 17921813), (7, 2560259), (13, 1378601), (31, 578123), (91, 196943), (217, 82589), (403, 44471), (2821, 6353)]