21590723

素因数分解:

$7^2\times {\mathrm{11}}^1\times {\mathrm{41}}^1\times {\mathrm{977}}^1$

素因数の和:1043

約数の個数: 24

約数和(自身を含む): 28095984

約数和(自身を除く): 6505261

約数列:

[1, 7, 11, 41, 49, 77, 287, 451, 539, 977, 2009, 3157, 6839, 10747, 22099, 40057, 47873, 75229, 280399, 440627, 526603, 1962793, 3084389, 21590723]

約数ペア:

[(1, 21590723), (7, 3084389), (11, 1962793), (41, 526603), (49, 440627), (77, 280399), (287, 75229), (451, 47873), (539, 40057), (977, 22099), (2009, 10747), (3157, 6839)]