19916565

素因数分解:

$3^1\times 5^1\times {\mathrm{71}}^1\times {\mathrm{18701}}^1$

素因数の和:18780

約数の個数: 16

約数和(自身を含む): 32317056

約数和(自身を除く): 12400491

約数列:

[1, 3, 5, 15, 71, 213, 355, 1065, 18701, 56103, 93505, 280515, 1327771, 3983313, 6638855, 19916565]

約数ペア:

[(1, 19916565), (3, 6638855), (5, 3983313), (15, 1327771), (71, 280515), (213, 93505), (355, 56103), (1065, 18701)]