81011215

素因数分解:

$5^1\times {\mathrm{31}}^1\times {\mathrm{157}}^1\times {\mathrm{3329}}^1$

素因数の和:3522

約数の個数: 16

約数和(自身を含む): 101018880

約数和(自身を除く): 20007665

約数列:

[1, 5, 31, 155, 157, 785, 3329, 4867, 16645, 24335, 103199, 515995, 522653, 2613265, 16202243, 81011215]

約数ペア:

[(1, 81011215), (5, 16202243), (31, 2613265), (155, 522653), (157, 515995), (785, 103199), (3329, 24335), (4867, 16645)]