20778836

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{409}}^1\times {\mathrm{977}}^1$

素因数の和:1403

約数の個数: 24

約数和(自身を含む): 39296040

約数和(自身を除く): 18517204

約数列:

[1, 2, 4, 13, 26, 52, 409, 818, 977, 1636, 1954, 3908, 5317, 10634, 12701, 21268, 25402, 50804, 399593, 799186, 1598372, 5194709, 10389418, 20778836]

約数ペア:

[(1, 20778836), (2, 10389418), (4, 5194709), (13, 1598372), (26, 799186), (52, 399593), (409, 50804), (818, 25402), (977, 21268), (1636, 12701), (1954, 10634), (3908, 5317)]