19356020

素因数分解:

$2^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{71}}^1\times {\mathrm{317}}^1$

素因数の和:440

約数の個数: 48

約数和(自身を含む): 42311808

約数和(自身を除く): 22955788

約数列:

[1, 2, 4, 5, 10, 20, 43, 71, 86, 142, 172, 215, 284, 317, 355, 430, 634, 710, 860, 1268, 1420, 1585, 3053, 3170, 6106, 6340, 12212, 13631, 15265, 22507, 27262, 30530, 45014, 54524, 61060, 68155, 90028, 112535, 136310, 225070, 272620, 450140, 967801, 1935602, 3871204, 4839005, 9678010, 19356020]

約数ペア:

[(1, 19356020), (2, 9678010), (4, 4839005), (5, 3871204), (10, 1935602), (20, 967801), (43, 450140), (71, 272620), (86, 225070), (142, 136310), (172, 112535), (215, 90028), (284, 68155), (317, 61060), (355, 54524), (430, 45014), (634, 30530), (710, 27262), (860, 22507), (1268, 15265), (1420, 13631), (1585, 12212), (3053, 6340), (3170, 6106)]