18551920

素因数分解:

$2^4\times 5^1\times {\mathrm{43}}^1\times {\mathrm{5393}}^1$

素因数の和:5449

約数の個数: 40

約数和(自身を含む): 44144496

約数和(自身を除く): 25592576

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 43, 80, 86, 172, 215, 344, 430, 688, 860, 1720, 3440, 5393, 10786, 21572, 26965, 43144, 53930, 86288, 107860, 215720, 231899, 431440, 463798, 927596, 1159495, 1855192, 2318990, 3710384, 4637980, 9275960, 18551920]

約数ペア:

[(1, 18551920), (2, 9275960), (4, 4637980), (5, 3710384), (8, 2318990), (10, 1855192), (16, 1159495), (20, 927596), (40, 463798), (43, 431440), (80, 231899), (86, 215720), (172, 107860), (215, 86288), (344, 53930), (430, 43144), (688, 26965), (860, 21572), (1720, 10786), (3440, 5393)]