20728268

素因数分解:

$2^2\times {\mathrm{11}}^2\times {\mathrm{113}}^1\times {\mathrm{379}}^1$

素因数の和:518

約数の個数: 36

約数和(自身を含む): 40330920

約数和(自身を除く): 19602652

約数列:

[1, 2, 4, 11, 22, 44, 113, 121, 226, 242, 379, 452, 484, 758, 1243, 1516, 2486, 4169, 4972, 8338, 13673, 16676, 27346, 42827, 45859, 54692, 85654, 91718, 171308, 183436, 471097, 942194, 1884388, 5182067, 10364134, 20728268]

約数ペア:

[(1, 20728268), (2, 10364134), (4, 5182067), (11, 1884388), (22, 942194), (44, 471097), (113, 183436), (121, 171308), (226, 91718), (242, 85654), (379, 54692), (452, 45859), (484, 42827), (758, 27346), (1243, 16676), (1516, 13673), (2486, 8338), (4169, 4972)]