20557695

素因数分解:

$3^1\times 5^1\times {\mathrm{71}}^1\times {\mathrm{97}}^1\times {\mathrm{199}}^1$

素因数の和:375

約数の個数: 32

約数和(自身を含む): 33868800

約数和(自身を除く): 13311105

約数列:

[1, 3, 5, 15, 71, 97, 199, 213, 291, 355, 485, 597, 995, 1065, 1455, 2985, 6887, 14129, 19303, 20661, 34435, 42387, 57909, 70645, 96515, 103305, 211935, 289545, 1370513, 4111539, 6852565, 20557695]

約数ペア:

[(1, 20557695), (3, 6852565), (5, 4111539), (15, 1370513), (71, 289545), (97, 211935), (199, 103305), (213, 96515), (291, 70645), (355, 57909), (485, 42387), (597, 34435), (995, 20661), (1065, 19303), (1455, 14129), (2985, 6887)]