20403385

素因数分解:

$5^1\times {\mathrm{29}}^1\times {\mathrm{223}}^1\times {\mathrm{631}}^1$

素因数の和:888

約数の個数: 16

約数和(自身を含む): 25482240

約数和(自身を除く): 5078855

約数列:

[1, 5, 29, 145, 223, 631, 1115, 3155, 6467, 18299, 32335, 91495, 140713, 703565, 4080677, 20403385]

約数ペア:

[(1, 20403385), (5, 4080677), (29, 703565), (145, 140713), (223, 91495), (631, 32335), (1115, 18299), (3155, 6467)]