21657964

素因数分解:

$2^2\times {\mathrm{31}}^1\times {\mathrm{389}}^1\times {\mathrm{449}}^1$

素因数の和:873

約数の個数: 24

約数和(自身を含む): 39312000

約数和(自身を除く): 17654036

約数列:

[1, 2, 4, 31, 62, 124, 389, 449, 778, 898, 1556, 1796, 12059, 13919, 24118, 27838, 48236, 55676, 174661, 349322, 698644, 5414491, 10828982, 21657964]

約数ペア:

[(1, 21657964), (2, 10828982), (4, 5414491), (31, 698644), (62, 349322), (124, 174661), (389, 55676), (449, 48236), (778, 27838), (898, 24118), (1556, 13919), (1796, 12059)]