20218708975

素因数分解:

$5^2\times {\mathrm{53}}^1\times {\mathrm{79}}^1\times {\mathrm{233}}^1\times {\mathrm{829}}^1$

素因数の和:1204

約数の個数: 48

約数和(自身を含む): 26009942400

約数和(自身を除く): 5791233425

約数列:

[1, 5, 25, 53, 79, 233, 265, 395, 829, 1165, 1325, 1975, 4145, 4187, 5825, 12349, 18407, 20725, 20935, 43937, 61745, 65491, 92035, 104675, 193157, 219685, 308725, 327455, 460175, 965785, 975571, 1098425, 1637275, 3471023, 4828925, 4877855, 10237321, 15259403, 17355115, 24389275, 51186605, 76297015, 86775575, 255933025, 381485075, 808748359, 4043741795, 20218708975]

約数ペア:

[(1, 20218708975), (5, 4043741795), (25, 808748359), (53, 381485075), (79, 255933025), (233, 86775575), (265, 76297015), (395, 51186605), (829, 24389275), (1165, 17355115), (1325, 15259403), (1975, 10237321), (4145, 4877855), (4187, 4828925), (5825, 3471023), (12349, 1637275), (18407, 1098425), (20725, 975571), (20935, 965785), (43937, 460175), (61745, 327455), (65491, 308725), (92035, 219685), (104675, 193157)]