21283964

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{397}}^1\times {\mathrm{1031}}^1$

素因数の和:1445

約数の個数: 24

約数和(自身を含む): 40252128

約数和(自身を除く): 18968164

約数列:

[1, 2, 4, 13, 26, 52, 397, 794, 1031, 1588, 2062, 4124, 5161, 10322, 13403, 20644, 26806, 53612, 409307, 818614, 1637228, 5320991, 10641982, 21283964]

約数ペア:

[(1, 21283964), (2, 10641982), (4, 5320991), (13, 1637228), (26, 818614), (52, 409307), (397, 53612), (794, 26806), (1031, 20644), (1588, 13403), (2062, 10322), (4124, 5161)]