21287900

素因数分解:

$2^2\times 5^2\times {\mathrm{193}}^1\times {\mathrm{1103}}^1$

素因数の和:1310

約数の個数: 36

約数和(自身を含む): 46476192

約数和(自身を除く): 25188292

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 193, 386, 772, 965, 1103, 1930, 2206, 3860, 4412, 4825, 5515, 9650, 11030, 19300, 22060, 27575, 55150, 110300, 212879, 425758, 851516, 1064395, 2128790, 4257580, 5321975, 10643950, 21287900]

約数ペア:

[(1, 21287900), (2, 10643950), (4, 5321975), (5, 4257580), (10, 2128790), (20, 1064395), (25, 851516), (50, 425758), (100, 212879), (193, 110300), (386, 55150), (772, 27575), (965, 22060), (1103, 19300), (1930, 11030), (2206, 9650), (3860, 5515), (4412, 4825)]