20832987

素因数分解:

$3^1\times 7^2\times {\mathrm{19}}^1\times {\mathrm{7459}}^1$

素因数の和:7495

約数の個数: 24

約数和(自身を含む): 34017600

約数和(自身を除く): 13184613

約数列:

[1, 3, 7, 19, 21, 49, 57, 133, 147, 399, 931, 2793, 7459, 22377, 52213, 141721, 156639, 365491, 425163, 992047, 1096473, 2976141, 6944329, 20832987]

約数ペア:

[(1, 20832987), (3, 6944329), (7, 2976141), (19, 1096473), (21, 992047), (49, 425163), (57, 365491), (133, 156639), (147, 141721), (399, 52213), (931, 22377), (2793, 7459)]