21989576

素因数分解:

$2^3\times 7^1\times {\mathrm{211}}^1\times {\mathrm{1861}}^1$

素因数の和:2085

約数の個数: 32

約数和(自身を含む): 47369280

約数和(自身を除く): 25379704

約数列:

[1, 2, 4, 7, 8, 14, 28, 56, 211, 422, 844, 1477, 1688, 1861, 2954, 3722, 5908, 7444, 11816, 13027, 14888, 26054, 52108, 104216, 392671, 785342, 1570684, 2748697, 3141368, 5497394, 10994788, 21989576]

約数ペア:

[(1, 21989576), (2, 10994788), (4, 5497394), (7, 3141368), (8, 2748697), (14, 1570684), (28, 785342), (56, 392671), (211, 104216), (422, 52108), (844, 26054), (1477, 14888), (1688, 13027), (1861, 11816), (2954, 7444), (3722, 5908)]