20705575

素因数分解:

$5^2\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{43}}^1\times {\mathrm{103}}^1$

素因数の和:184

約数の個数: 48

約数和(自身を含む): 30640896

約数和(自身を除く): 9935321

約数列:

[1, 5, 11, 17, 25, 43, 55, 85, 103, 187, 215, 275, 425, 473, 515, 731, 935, 1075, 1133, 1751, 2365, 2575, 3655, 4429, 4675, 5665, 8041, 8755, 11825, 18275, 19261, 22145, 28325, 40205, 43775, 48719, 75293, 96305, 110725, 201025, 243595, 376465, 481525, 828223, 1217975, 1882325, 4141115, 20705575]

約数ペア:

[(1, 20705575), (5, 4141115), (11, 1882325), (17, 1217975), (25, 828223), (43, 481525), (55, 376465), (85, 243595), (103, 201025), (187, 110725), (215, 96305), (275, 75293), (425, 48719), (473, 43775), (515, 40205), (731, 28325), (935, 22145), (1075, 19261), (1133, 18275), (1751, 11825), (2365, 8755), (2575, 8041), (3655, 5665), (4429, 4675)]