18881429

素因数分解:

$7^1\times {\mathrm{43}}^1\times {\mathrm{149}}^1\times {\mathrm{421}}^1$

素因数の和:620

約数の個数: 16

約数和(自身を含む): 22281600

約数和(自身を除く): 3400171

約数列:

[1, 7, 43, 149, 301, 421, 1043, 2947, 6407, 18103, 44849, 62729, 126721, 439103, 2697347, 18881429]

約数ペア:

[(1, 18881429), (7, 2697347), (43, 439103), (149, 126721), (301, 62729), (421, 44849), (1043, 18103), (2947, 6407)]