20713815

素因数分解:

$3^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{103}}^1\times {\mathrm{109}}^1$

素因数の和:264

約数の個数: 48

約数和(自身を含む): 37477440

約数和(自身を除く): 16763625

約数列:

[1, 3, 5, 9, 15, 41, 45, 103, 109, 123, 205, 309, 327, 369, 515, 545, 615, 927, 981, 1545, 1635, 1845, 4223, 4469, 4635, 4905, 11227, 12669, 13407, 21115, 22345, 33681, 38007, 40221, 56135, 63345, 67035, 101043, 168405, 190035, 201105, 460307, 505215, 1380921, 2301535, 4142763, 6904605, 20713815]

約数ペア:

[(1, 20713815), (3, 6904605), (5, 4142763), (9, 2301535), (15, 1380921), (41, 505215), (45, 460307), (103, 201105), (109, 190035), (123, 168405), (205, 101043), (309, 67035), (327, 63345), (369, 56135), (515, 40221), (545, 38007), (615, 33681), (927, 22345), (981, 21115), (1545, 13407), (1635, 12669), (1845, 11227), (4223, 4905), (4469, 4635)]