21684417

素因数分解:

$3^1\times {\mathrm{139}}^1\times {\mathrm{149}}^1\times {\mathrm{349}}^1$

素因数の和:640

約数の個数: 16

約数和(自身を含む): 29400000

約数和(自身を除く): 7715583

約数列:

[1, 3, 139, 149, 349, 417, 447, 1047, 20711, 48511, 52001, 62133, 145533, 156003, 7228139, 21684417]

約数ペア:

[(1, 21684417), (3, 7228139), (139, 156003), (149, 145533), (349, 62133), (417, 52001), (447, 48511), (1047, 20711)]