21243872

素因数分解:

$2^5\times {\mathrm{13}}^1\times {\mathrm{223}}^1\times {\mathrm{229}}^1$

素因数の和:475

約数の個数: 48

約数和(自身を含む): 45440640

約数和(自身を除く): 24196768

約数列:

[1, 2, 4, 8, 13, 16, 26, 32, 52, 104, 208, 223, 229, 416, 446, 458, 892, 916, 1784, 1832, 2899, 2977, 3568, 3664, 5798, 5954, 7136, 7328, 11596, 11908, 23192, 23816, 46384, 47632, 51067, 92768, 95264, 102134, 204268, 408536, 663871, 817072, 1327742, 1634144, 2655484, 5310968, 10621936, 21243872]

約数ペア:

[(1, 21243872), (2, 10621936), (4, 5310968), (8, 2655484), (13, 1634144), (16, 1327742), (26, 817072), (32, 663871), (52, 408536), (104, 204268), (208, 102134), (223, 95264), (229, 92768), (416, 51067), (446, 47632), (458, 46384), (892, 23816), (916, 23192), (1784, 11908), (1832, 11596), (2899, 7328), (2977, 7136), (3568, 5954), (3664, 5798)]