20081392

素因数分解:

$2^4\times {\mathrm{23}}^1\times {\mathrm{197}}^1\times {\mathrm{277}}^1$

素因数の和:505

約数の個数: 40

約数和(自身を含む): 40952736

約数和(自身を除く): 20871344

約数列:

[1, 2, 4, 8, 16, 23, 46, 92, 184, 197, 277, 368, 394, 554, 788, 1108, 1576, 2216, 3152, 4432, 4531, 6371, 9062, 12742, 18124, 25484, 36248, 50968, 54569, 72496, 101936, 109138, 218276, 436552, 873104, 1255087, 2510174, 5020348, 10040696, 20081392]

約数ペア:

[(1, 20081392), (2, 10040696), (4, 5020348), (8, 2510174), (16, 1255087), (23, 873104), (46, 436552), (92, 218276), (184, 109138), (197, 101936), (277, 72496), (368, 54569), (394, 50968), (554, 36248), (788, 25484), (1108, 18124), (1576, 12742), (2216, 9062), (3152, 6371), (4432, 4531)]