20257744

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{17}}^2\times {\mathrm{337}}^1$

素因数の和:392

約数の個数: 60

約数和(自身を含む): 45034444

約数和(自身を除く): 24776700

約数列:

[1, 2, 4, 8, 13, 16, 17, 26, 34, 52, 68, 104, 136, 208, 221, 272, 289, 337, 442, 578, 674, 884, 1156, 1348, 1768, 2312, 2696, 3536, 3757, 4381, 4624, 5392, 5729, 7514, 8762, 11458, 15028, 17524, 22916, 30056, 35048, 45832, 60112, 70096, 74477, 91664, 97393, 148954, 194786, 297908, 389572, 595816, 779144, 1191632, 1266109, 1558288, 2532218, 5064436, 10128872, 20257744]

約数ペア:

[(1, 20257744), (2, 10128872), (4, 5064436), (8, 2532218), (13, 1558288), (16, 1266109), (17, 1191632), (26, 779144), (34, 595816), (52, 389572), (68, 297908), (104, 194786), (136, 148954), (208, 97393), (221, 91664), (272, 74477), (289, 70096), (337, 60112), (442, 45832), (578, 35048), (674, 30056), (884, 22916), (1156, 17524), (1348, 15028), (1768, 11458), (2312, 8762), (2696, 7514), (3536, 5729), (3757, 5392), (4381, 4624)]