21684016

素因数分解:

$2^4\times {\mathrm{19}}^1\times {\mathrm{71329}}^1$

素因数の和:71356

約数の個数: 20

約数和(自身を含む): 44224600

約数和(自身を除く): 22540584

約数列:

[1, 2, 4, 8, 16, 19, 38, 76, 152, 304, 71329, 142658, 285316, 570632, 1141264, 1355251, 2710502, 5421004, 10842008, 21684016]

約数ペア:

[(1, 21684016), (2, 10842008), (4, 5421004), (8, 2710502), (16, 1355251), (19, 1141264), (38, 570632), (76, 285316), (152, 142658), (304, 71329)]