16405821

素因数分解:

$3^4\times {\mathrm{67}}^1\times {\mathrm{3023}}^1$

素因数の和:3102

約数の個数: 20

約数和(自身を含む): 24881472

約数和(自身を除く): 8475651

約数列:

[1, 3, 9, 27, 67, 81, 201, 603, 1809, 3023, 5427, 9069, 27207, 81621, 202541, 244863, 607623, 1822869, 5468607, 16405821]

約数ペア:

[(1, 16405821), (3, 5468607), (9, 1822869), (27, 607623), (67, 244863), (81, 202541), (201, 81621), (603, 27207), (1809, 9069), (3023, 5427)]