19997235

素因数分解:

$3^2\times 5^1\times {\mathrm{23}}^1\times {\mathrm{139}}^2$

素因数の和:312

約数の個数: 36

約数和(自身を含む): 36430992

約数和(自身を除く): 16433757

約数列:

[1, 3, 5, 9, 15, 23, 45, 69, 115, 139, 207, 345, 417, 695, 1035, 1251, 2085, 3197, 6255, 9591, 15985, 19321, 28773, 47955, 57963, 96605, 143865, 173889, 289815, 444383, 869445, 1333149, 2221915, 3999447, 6665745, 19997235]

約数ペア:

[(1, 19997235), (3, 6665745), (5, 3999447), (9, 2221915), (15, 1333149), (23, 869445), (45, 444383), (69, 289815), (115, 173889), (139, 143865), (207, 96605), (345, 57963), (417, 47955), (695, 28773), (1035, 19321), (1251, 15985), (2085, 9591), (3197, 6255)]