18889975

素因数分解:

$5^2\times {\mathrm{13}}^2\times {\mathrm{17}}^1\times {\mathrm{263}}^1$

素因数の和:316

約数の個数: 36

約数和(自身を含む): 26958096

約数和(自身を除く): 8068121

約数列:

[1, 5, 13, 17, 25, 65, 85, 169, 221, 263, 325, 425, 845, 1105, 1315, 2873, 3419, 4225, 4471, 5525, 6575, 14365, 17095, 22355, 44447, 58123, 71825, 85475, 111775, 222235, 290615, 755599, 1111175, 1453075, 3777995, 18889975]

約数ペア:

[(1, 18889975), (5, 3777995), (13, 1453075), (17, 1111175), (25, 755599), (65, 290615), (85, 222235), (169, 111775), (221, 85475), (263, 71825), (325, 58123), (425, 44447), (845, 22355), (1105, 17095), (1315, 14365), (2873, 6575), (3419, 5525), (4225, 4471)]