21561964

素因数分解:

$2^2\times {\mathrm{29}}^1\times {\mathrm{269}}^1\times {\mathrm{691}}^1$

素因数の和:993

約数の個数: 24

約数和(自身を含む): 39236400

約数和(自身を除く): 17674436

約数列:

[1, 2, 4, 29, 58, 116, 269, 538, 691, 1076, 1382, 2764, 7801, 15602, 20039, 31204, 40078, 80156, 185879, 371758, 743516, 5390491, 10780982, 21561964]

約数ペア:

[(1, 21561964), (2, 10780982), (4, 5390491), (29, 743516), (58, 371758), (116, 185879), (269, 80156), (538, 40078), (691, 31204), (1076, 20039), (1382, 15602), (2764, 7801)]