21248440

素因数分解:

$2^3\times 5^1\times {\mathrm{479}}^1\times {\mathrm{1109}}^1$

素因数の和:1599

約数の個数: 32

約数和(自身を含む): 47952000

約数和(自身を除く): 26703560

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 479, 958, 1109, 1916, 2218, 2395, 3832, 4436, 4790, 5545, 8872, 9580, 11090, 19160, 22180, 44360, 531211, 1062422, 2124844, 2656055, 4249688, 5312110, 10624220, 21248440]

約数ペア:

[(1, 21248440), (2, 10624220), (4, 5312110), (5, 4249688), (8, 2656055), (10, 2124844), (20, 1062422), (40, 531211), (479, 44360), (958, 22180), (1109, 19160), (1916, 11090), (2218, 9580), (2395, 8872), (3832, 5545), (4436, 4790)]