20861488

素因数分解:

$2^4\times {\mathrm{37}}^1\times {\mathrm{131}}^1\times {\mathrm{269}}^1$

素因数の和:445

約数の個数: 40

約数和(自身を含む): 41983920

約数和(自身を除く): 21122432

約数列:

[1, 2, 4, 8, 16, 37, 74, 131, 148, 262, 269, 296, 524, 538, 592, 1048, 1076, 2096, 2152, 4304, 4847, 9694, 9953, 19388, 19906, 35239, 38776, 39812, 70478, 77552, 79624, 140956, 159248, 281912, 563824, 1303843, 2607686, 5215372, 10430744, 20861488]

約数ペア:

[(1, 20861488), (2, 10430744), (4, 5215372), (8, 2607686), (16, 1303843), (37, 563824), (74, 281912), (131, 159248), (148, 140956), (262, 79624), (269, 77552), (296, 70478), (524, 39812), (538, 38776), (592, 35239), (1048, 19906), (1076, 19388), (2096, 9953), (2152, 9694), (4304, 4847)]