21660416

素因数分解:

$2^8\times {\mathrm{211}}^1\times {\mathrm{401}}^1$

素因数の和:628

約数の個数: 36

約数和(自身を含む): 43549464

約数和(自身を除く): 21889048

約数列:

[1, 2, 4, 8, 16, 32, 64, 128, 211, 256, 401, 422, 802, 844, 1604, 1688, 3208, 3376, 6416, 6752, 12832, 13504, 25664, 27008, 51328, 54016, 84611, 102656, 169222, 338444, 676888, 1353776, 2707552, 5415104, 10830208, 21660416]

約数ペア:

[(1, 21660416), (2, 10830208), (4, 5415104), (8, 2707552), (16, 1353776), (32, 676888), (64, 338444), (128, 169222), (211, 102656), (256, 84611), (401, 54016), (422, 51328), (802, 27008), (844, 25664), (1604, 13504), (1688, 12832), (3208, 6752), (3376, 6416)]