21263008

素因数分解:

$2^5\times {\mathrm{13}}^1\times {\mathrm{79}}^1\times {\mathrm{647}}^1$

素因数の和:749

約数の個数: 48

約数和(自身を含む): 45722880

約数和(自身を除く): 24459872

約数列:

[1, 2, 4, 8, 13, 16, 26, 32, 52, 79, 104, 158, 208, 316, 416, 632, 647, 1027, 1264, 1294, 2054, 2528, 2588, 4108, 5176, 8216, 8411, 10352, 16432, 16822, 20704, 32864, 33644, 51113, 67288, 102226, 134576, 204452, 269152, 408904, 664469, 817808, 1328938, 1635616, 2657876, 5315752, 10631504, 21263008]

約数ペア:

[(1, 21263008), (2, 10631504), (4, 5315752), (8, 2657876), (13, 1635616), (16, 1328938), (26, 817808), (32, 664469), (52, 408904), (79, 269152), (104, 204452), (158, 134576), (208, 102226), (316, 67288), (416, 51113), (632, 33644), (647, 32864), (1027, 20704), (1264, 16822), (1294, 16432), (2054, 10352), (2528, 8411), (2588, 8216), (4108, 5176)]