20685875

素因数分解:

$5^3\times 7^1\times {\mathrm{47}}^1\times {\mathrm{503}}^1$

素因数の和:572

約数の個数: 32

約数和(自身を含む): 30191616

約数和(自身を除く): 9505741

約数列:

[1, 5, 7, 25, 35, 47, 125, 175, 235, 329, 503, 875, 1175, 1645, 2515, 3521, 5875, 8225, 12575, 17605, 23641, 41125, 62875, 88025, 118205, 165487, 440125, 591025, 827435, 2955125, 4137175, 20685875]

約数ペア:

[(1, 20685875), (5, 4137175), (7, 2955125), (25, 827435), (35, 591025), (47, 440125), (125, 165487), (175, 118205), (235, 88025), (329, 62875), (503, 41125), (875, 23641), (1175, 17605), (1645, 12575), (2515, 8225), (3521, 5875)]