20187785

素因数分解:

$5^1\times {\mathrm{19}}^1\times {\mathrm{41}}^1\times {\mathrm{71}}^1\times {\mathrm{73}}^1$

素因数の和:209

約数の個数: 32

約数和(自身を含む): 26853120

約数和(自身を除く): 6665335

約数列:

[1, 5, 19, 41, 71, 73, 95, 205, 355, 365, 779, 1349, 1387, 2911, 2993, 3895, 5183, 6745, 6935, 14555, 14965, 25915, 55309, 56867, 98477, 212503, 276545, 284335, 492385, 1062515, 4037557, 20187785]

約数ペア:

[(1, 20187785), (5, 4037557), (19, 1062515), (41, 492385), (71, 284335), (73, 276545), (95, 212503), (205, 98477), (355, 56867), (365, 55309), (779, 25915), (1349, 14965), (1387, 14555), (2911, 6935), (2993, 6745), (3895, 5183)]