20112925

素因数分解:

$5^2\times 7^1\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{263}}^1$

素因数の和:322

約数の個数: 48

約数和(自身を含む): 31426560

約数和(自身を除く): 11313635

約数列:

[1, 5, 7, 19, 23, 25, 35, 95, 115, 133, 161, 175, 263, 437, 475, 575, 665, 805, 1315, 1841, 2185, 3059, 3325, 4025, 4997, 6049, 6575, 9205, 10925, 15295, 24985, 30245, 34979, 42343, 46025, 76475, 114931, 124925, 151225, 174895, 211715, 574655, 804517, 874475, 1058575, 2873275, 4022585, 20112925]

約数ペア:

[(1, 20112925), (5, 4022585), (7, 2873275), (19, 1058575), (23, 874475), (25, 804517), (35, 574655), (95, 211715), (115, 174895), (133, 151225), (161, 124925), (175, 114931), (263, 76475), (437, 46025), (475, 42343), (575, 34979), (665, 30245), (805, 24985), (1315, 15295), (1841, 10925), (2185, 9205), (3059, 6575), (3325, 6049), (4025, 4997)]