20828997

素因数分解:

$3^2\times 7^1\times {\mathrm{19}}^1\times {\mathrm{17401}}^1$

素因数の和:17433

約数の個数: 24

約数和(自身を含む): 36196160

約数和(自身を除く): 15367163

約数列:

[1, 3, 7, 9, 19, 21, 57, 63, 133, 171, 399, 1197, 17401, 52203, 121807, 156609, 330619, 365421, 991857, 1096263, 2314333, 2975571, 6942999, 20828997]

約数ペア:

[(1, 20828997), (3, 6942999), (7, 2975571), (9, 2314333), (19, 1096263), (21, 991857), (57, 365421), (63, 330619), (133, 156609), (171, 121807), (399, 52203), (1197, 17401)]