19918736

素因数分解:

$2^4\times {\mathrm{23}}^1\times {\mathrm{113}}^1\times {\mathrm{479}}^1$

素因数の和:623

約数の個数: 40

約数和(自身を含む): 40711680

約数和(自身を除く): 20792944

約数列:

[1, 2, 4, 8, 16, 23, 46, 92, 113, 184, 226, 368, 452, 479, 904, 958, 1808, 1916, 2599, 3832, 5198, 7664, 10396, 11017, 20792, 22034, 41584, 44068, 54127, 88136, 108254, 176272, 216508, 433016, 866032, 1244921, 2489842, 4979684, 9959368, 19918736]

約数ペア:

[(1, 19918736), (2, 9959368), (4, 4979684), (8, 2489842), (16, 1244921), (23, 866032), (46, 433016), (92, 216508), (113, 176272), (184, 108254), (226, 88136), (368, 54127), (452, 44068), (479, 41584), (904, 22034), (958, 20792), (1808, 11017), (1916, 10396), (2599, 7664), (3832, 5198)]