21817397

素因数分解:

$7^2\times {\mathrm{31}}^1\times {\mathrm{53}}^1\times {\mathrm{271}}^1$

素因数の和:369

約数の個数: 24

約数和(自身を含む): 26790912

約数和(自身を除く): 4973515

約数列:

[1, 7, 31, 49, 53, 217, 271, 371, 1519, 1643, 1897, 2597, 8401, 11501, 13279, 14363, 58807, 80507, 100541, 411649, 445253, 703787, 3116771, 21817397]

約数ペア:

[(1, 21817397), (7, 3116771), (31, 703787), (49, 445253), (53, 411649), (217, 100541), (271, 80507), (371, 58807), (1519, 14363), (1643, 13279), (1897, 11501), (2597, 8401)]