20218725

素因数分解:

$3^2\times 5^2\times {\mathrm{23}}^1\times {\mathrm{3907}}^1$

素因数の和:3946

約数の個数: 36

約数和(自身を含む): 37798176

約数和(自身を除く): 17579451

約数列:

[1, 3, 5, 9, 15, 23, 25, 45, 69, 75, 115, 207, 225, 345, 575, 1035, 1725, 3907, 5175, 11721, 19535, 35163, 58605, 89861, 97675, 175815, 269583, 293025, 449305, 808749, 879075, 1347915, 2246525, 4043745, 6739575, 20218725]

約数ペア:

[(1, 20218725), (3, 6739575), (5, 4043745), (9, 2246525), (15, 1347915), (23, 879075), (25, 808749), (45, 449305), (69, 293025), (75, 269583), (115, 175815), (207, 97675), (225, 89861), (345, 58605), (575, 35163), (1035, 19535), (1725, 11721), (3907, 5175)]