20154875

素因数分解:

$5^3\times {\mathrm{13}}^1\times {\mathrm{79}}^1\times {\mathrm{157}}^1$

素因数の和:264

約数の個数: 32

約数和(自身を含む): 27605760

約数和(自身を除く): 7450885

約数列:

[1, 5, 13, 25, 65, 79, 125, 157, 325, 395, 785, 1027, 1625, 1975, 2041, 3925, 5135, 9875, 10205, 12403, 19625, 25675, 51025, 62015, 128375, 161239, 255125, 310075, 806195, 1550375, 4030975, 20154875]

約数ペア:

[(1, 20154875), (5, 4030975), (13, 1550375), (25, 806195), (65, 310075), (79, 255125), (125, 161239), (157, 128375), (325, 62015), (395, 51025), (785, 25675), (1027, 19625), (1625, 12403), (1975, 10205), (2041, 9875), (3925, 5135)]