20582205

素因数分解:

$3^1\times 5^1\times 7^2\times {\mathrm{41}}^1\times {\mathrm{683}}^1$

素因数の和:746

約数の個数: 48

約数和(自身を含む): 39299904

約数和(自身を除く): 18717699

約数列:

[1, 3, 5, 7, 15, 21, 35, 41, 49, 105, 123, 147, 205, 245, 287, 615, 683, 735, 861, 1435, 2009, 2049, 3415, 4305, 4781, 6027, 10045, 10245, 14343, 23905, 28003, 30135, 33467, 71715, 84009, 100401, 140015, 167335, 196021, 420045, 502005, 588063, 980105, 1372147, 2940315, 4116441, 6860735, 20582205]

約数ペア:

[(1, 20582205), (3, 6860735), (5, 4116441), (7, 2940315), (15, 1372147), (21, 980105), (35, 588063), (41, 502005), (49, 420045), (105, 196021), (123, 167335), (147, 140015), (205, 100401), (245, 84009), (287, 71715), (615, 33467), (683, 30135), (735, 28003), (861, 23905), (1435, 14343), (2009, 10245), (2049, 10045), (3415, 6027), (4305, 4781)]