21010015

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{7517}}^1$

素因数の和:7578

約数の個数: 16

約数和(自身を含む): 27786528

約数和(自身を除く): 6776513

約数列:

[1, 5, 13, 43, 65, 215, 559, 2795, 7517, 37585, 97721, 323231, 488605, 1616155, 4202003, 21010015]

約数ペア:

[(1, 21010015), (5, 4202003), (13, 1616155), (43, 488605), (65, 323231), (215, 97721), (559, 37585), (2795, 7517)]