18808540

素因数分解:

$2^2\times 5^1\times {\mathrm{211}}^1\times {\mathrm{4457}}^1$

素因数の和:4677

約数の個数: 24

約数和(自身を含む): 39694032

約数和(自身を除く): 20885492

約数列:

[1, 2, 4, 5, 10, 20, 211, 422, 844, 1055, 2110, 4220, 4457, 8914, 17828, 22285, 44570, 89140, 940427, 1880854, 3761708, 4702135, 9404270, 18808540]

約数ペア:

[(1, 18808540), (2, 9404270), (4, 4702135), (5, 3761708), (10, 1880854), (20, 940427), (211, 89140), (422, 44570), (844, 22285), (1055, 17828), (2110, 8914), (4220, 4457)]