19801355

素因数分解:

$5^1\times 7^1\times {\mathrm{149}}^1\times {\mathrm{3797}}^1$

素因数の和:3958

約数の個数: 16

約数和(自身を含む): 27345600

約数和(自身を除く): 7544245

約数列:

[1, 5, 7, 35, 149, 745, 1043, 3797, 5215, 18985, 26579, 132895, 565753, 2828765, 3960271, 19801355]

約数ペア:

[(1, 19801355), (5, 3960271), (7, 2828765), (35, 565753), (149, 132895), (745, 26579), (1043, 18985), (3797, 5215)]