20513577

素因数分解:

$3^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{37}}^1\times {\mathrm{1553}}^1$

素因数の和:1617

約数の個数: 32

約数和(自身を含む): 34013952

約数和(自身を除く): 13500375

約数列:

[1, 3, 7, 17, 21, 37, 51, 111, 119, 259, 357, 629, 777, 1553, 1887, 4403, 4659, 10871, 13209, 26401, 32613, 57461, 79203, 172383, 184807, 402227, 554421, 976837, 1206681, 2930511, 6837859, 20513577]

約数ペア:

[(1, 20513577), (3, 6837859), (7, 2930511), (17, 1206681), (21, 976837), (37, 554421), (51, 402227), (111, 184807), (119, 172383), (259, 79203), (357, 57461), (629, 32613), (777, 26401), (1553, 13209), (1887, 10871), (4403, 4659)]