21058961

素因数分解:

$7^1\times {\mathrm{11}}^2\times {\mathrm{23}}^2\times {\mathrm{47}}^1$

素因数の和:122

約数の個数: 36

約数和(自身を含む): 28242816

約数和(自身を除く): 7183855

約数列:

[1, 7, 11, 23, 47, 77, 121, 161, 253, 329, 517, 529, 847, 1081, 1771, 2783, 3619, 3703, 5687, 5819, 7567, 11891, 19481, 24863, 39809, 40733, 64009, 83237, 130801, 174041, 273493, 448063, 915607, 1914451, 3008423, 21058961]

約数ペア:

[(1, 21058961), (7, 3008423), (11, 1914451), (23, 915607), (47, 448063), (77, 273493), (121, 174041), (161, 130801), (253, 83237), (329, 64009), (517, 40733), (529, 39809), (847, 24863), (1081, 19481), (1771, 11891), (2783, 7567), (3619, 5819), (3703, 5687)]