20823285

素因数分解:

$3^1\times 5^1\times 7^2\times {\mathrm{41}}^1\times {\mathrm{691}}^1$

素因数の和:754

約数の個数: 48

約数和(自身を含む): 39759552

約数和(自身を除く): 18936267

約数列:

[1, 3, 5, 7, 15, 21, 35, 41, 49, 105, 123, 147, 205, 245, 287, 615, 691, 735, 861, 1435, 2009, 2073, 3455, 4305, 4837, 6027, 10045, 10365, 14511, 24185, 28331, 30135, 33859, 72555, 84993, 101577, 141655, 169295, 198317, 424965, 507885, 594951, 991585, 1388219, 2974755, 4164657, 6941095, 20823285]

約数ペア:

[(1, 20823285), (3, 6941095), (5, 4164657), (7, 2974755), (15, 1388219), (21, 991585), (35, 594951), (41, 507885), (49, 424965), (105, 198317), (123, 169295), (147, 141655), (205, 101577), (245, 84993), (287, 72555), (615, 33859), (691, 30135), (735, 28331), (861, 24185), (1435, 14511), (2009, 10365), (2073, 10045), (3455, 6027), (4305, 4837)]