20385405

素因数分解:

$3^3\times 5^1\times {\mathrm{29}}^1\times {\mathrm{41}}^1\times {\mathrm{127}}^1$

素因数の和:211

約数の個数: 64

約数和(自身を含む): 38707200

約数和(自身を除く): 18321795

約数列:

[1, 3, 5, 9, 15, 27, 29, 41, 45, 87, 123, 127, 135, 145, 205, 261, 369, 381, 435, 615, 635, 783, 1107, 1143, 1189, 1305, 1845, 1905, 3429, 3567, 3683, 3915, 5207, 5535, 5715, 5945, 10701, 11049, 15621, 17145, 17835, 18415, 26035, 32103, 33147, 46863, 53505, 55245, 78105, 99441, 140589, 151003, 160515, 165735, 234315, 453009, 497205, 702945, 755015, 1359027, 2265045, 4077081, 6795135, 20385405]

約数ペア:

[(1, 20385405), (3, 6795135), (5, 4077081), (9, 2265045), (15, 1359027), (27, 755015), (29, 702945), (41, 497205), (45, 453009), (87, 234315), (123, 165735), (127, 160515), (135, 151003), (145, 140589), (205, 99441), (261, 78105), (369, 55245), (381, 53505), (435, 46863), (615, 33147), (635, 32103), (783, 26035), (1107, 18415), (1143, 17835), (1189, 17145), (1305, 15621), (1845, 11049), (1905, 10701), (3429, 5945), (3567, 5715), (3683, 5535), (3915, 5207)]