20658875

素因数分解:

$5^3\times {\mathrm{29}}^1\times {\mathrm{41}}^1\times {\mathrm{139}}^1$

素因数の和:224

約数の個数: 32

約数和(自身を含む): 27518400

約数和(自身を除く): 6859525

約数列:

[1, 5, 25, 29, 41, 125, 139, 145, 205, 695, 725, 1025, 1189, 3475, 3625, 4031, 5125, 5699, 5945, 17375, 20155, 28495, 29725, 100775, 142475, 148625, 165271, 503875, 712375, 826355, 4131775, 20658875]

約数ペア:

[(1, 20658875), (5, 4131775), (25, 826355), (29, 712375), (41, 503875), (125, 165271), (139, 148625), (145, 142475), (205, 100775), (695, 29725), (725, 28495), (1025, 20155), (1189, 17375), (3475, 5945), (3625, 5699), (4031, 5125)]