21391504

素因数分解:

$2^4\times {\mathrm{41}}^1\times {\mathrm{32609}}^1$

素因数の和:32658

約数の個数: 20

約数和(自身を含む): 42458220

約数和(自身を除く): 21066716

約数列:

[1, 2, 4, 8, 16, 41, 82, 164, 328, 656, 32609, 65218, 130436, 260872, 521744, 1336969, 2673938, 5347876, 10695752, 21391504]

約数ペア:

[(1, 21391504), (2, 10695752), (4, 5347876), (8, 2673938), (16, 1336969), (41, 521744), (82, 260872), (164, 130436), (328, 65218), (656, 32609)]