21112325

素因数分解:

$5^2\times {\mathrm{13}}^2\times {\mathrm{19}}^1\times {\mathrm{263}}^1$

素因数の和:318

約数の個数: 36

約数和(自身を含む): 29953440

約数和(自身を除く): 8841115

約数列:

[1, 5, 13, 19, 25, 65, 95, 169, 247, 263, 325, 475, 845, 1235, 1315, 3211, 3419, 4225, 4997, 6175, 6575, 16055, 17095, 24985, 44447, 64961, 80275, 85475, 124925, 222235, 324805, 844493, 1111175, 1624025, 4222465, 21112325]

約数ペア:

[(1, 21112325), (5, 4222465), (13, 1624025), (19, 1111175), (25, 844493), (65, 324805), (95, 222235), (169, 124925), (247, 85475), (263, 80275), (325, 64961), (475, 44447), (845, 24985), (1235, 17095), (1315, 16055), (3211, 6575), (3419, 6175), (4225, 4997)]