21904017

素因数分解:

$3^1\times {\mathrm{19}}^1\times {\mathrm{251}}^1\times {\mathrm{1531}}^1$

素因数の和:1804

約数の個数: 16

約数和(自身を含む): 30885120

約数和(自身を除く): 8981103

約数列:

[1, 3, 19, 57, 251, 753, 1531, 4593, 4769, 14307, 29089, 87267, 384281, 1152843, 7301339, 21904017]

約数ペア:

[(1, 21904017), (3, 7301339), (19, 1152843), (57, 384281), (251, 87267), (753, 29089), (1531, 14307), (4593, 4769)]