21797237

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{47}}^1\times {\mathrm{317}}^1$

素因数の和:401

約数の個数: 32

約数和(自身を含む): 29306880

約数和(自身を除く): 7509643

約数列:

[1, 7, 11, 19, 47, 77, 133, 209, 317, 329, 517, 893, 1463, 2219, 3487, 3619, 6023, 6251, 9823, 14899, 24409, 42161, 66253, 68761, 104293, 163889, 283081, 463771, 1147223, 1981567, 3113891, 21797237]

約数ペア:

[(1, 21797237), (7, 3113891), (11, 1981567), (19, 1147223), (47, 463771), (77, 283081), (133, 163889), (209, 104293), (317, 68761), (329, 66253), (517, 42161), (893, 24409), (1463, 14899), (2219, 9823), (3487, 6251), (3619, 6023)]