20449725

素因数分解:

$3^1\times 5^2\times {\mathrm{17}}^1\times {\mathrm{43}}^1\times {\mathrm{373}}^1$

素因数の和:446

約数の個数: 48

約数和(自身を含む): 36729792

約数和(自身を除く): 16280067

約数列:

[1, 3, 5, 15, 17, 25, 43, 51, 75, 85, 129, 215, 255, 373, 425, 645, 731, 1075, 1119, 1275, 1865, 2193, 3225, 3655, 5595, 6341, 9325, 10965, 16039, 18275, 19023, 27975, 31705, 48117, 54825, 80195, 95115, 158525, 240585, 272663, 400975, 475575, 817989, 1202925, 1363315, 4089945, 6816575, 20449725]

約数ペア:

[(1, 20449725), (3, 6816575), (5, 4089945), (15, 1363315), (17, 1202925), (25, 817989), (43, 475575), (51, 400975), (75, 272663), (85, 240585), (129, 158525), (215, 95115), (255, 80195), (373, 54825), (425, 48117), (645, 31705), (731, 27975), (1075, 19023), (1119, 18275), (1275, 16039), (1865, 10965), (2193, 9325), (3225, 6341), (3655, 5595)]