21891988

素因数分解:

$2^2\times {\mathrm{17}}^1\times {\mathrm{43}}^1\times {\mathrm{7487}}^1$

素因数の和:7551

約数の個数: 24

約数和(自身を含む): 41513472

約数和(自身を除く): 19621484

約数列:

[1, 2, 4, 17, 34, 43, 68, 86, 172, 731, 1462, 2924, 7487, 14974, 29948, 127279, 254558, 321941, 509116, 643882, 1287764, 5472997, 10945994, 21891988]

約数ペア:

[(1, 21891988), (2, 10945994), (4, 5472997), (17, 1287764), (34, 643882), (43, 509116), (68, 321941), (86, 254558), (172, 127279), (731, 29948), (1462, 14974), (2924, 7487)]