21067880

素因数分解:

$2^3\times 5^1\times {\mathrm{193}}^1\times {\mathrm{2729}}^1$

素因数の和:2933

約数の個数: 32

約数和(自身を含む): 47665800

約数和(自身を除く): 26597920

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 193, 386, 772, 965, 1544, 1930, 2729, 3860, 5458, 7720, 10916, 13645, 21832, 27290, 54580, 109160, 526697, 1053394, 2106788, 2633485, 4213576, 5266970, 10533940, 21067880]

約数ペア:

[(1, 21067880), (2, 10533940), (4, 5266970), (5, 4213576), (8, 2633485), (10, 2106788), (20, 1053394), (40, 526697), (193, 109160), (386, 54580), (772, 27290), (965, 21832), (1544, 13645), (1930, 10916), (2729, 7720), (3860, 5458)]