21820015

素因数分解:

$5^1\times 7^1\times {\mathrm{131}}^1\times {\mathrm{4759}}^1$

素因数の和:4902

約数の個数: 16

約数和(自身を含む): 30159360

約数和(自身を除く): 8339345

約数列:

[1, 5, 7, 35, 131, 655, 917, 4585, 4759, 23795, 33313, 166565, 623429, 3117145, 4364003, 21820015]

約数ペア:

[(1, 21820015), (5, 4364003), (7, 3117145), (35, 623429), (131, 166565), (655, 33313), (917, 23795), (4585, 4759)]