21863504

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{257}}^1\times {\mathrm{409}}^1$

素因数の和:687

約数の個数: 40

約数和(自身を含む): 45908520

約数和(自身を除く): 24045016

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 104, 208, 257, 409, 514, 818, 1028, 1636, 2056, 3272, 3341, 4112, 5317, 6544, 6682, 10634, 13364, 21268, 26728, 42536, 53456, 85072, 105113, 210226, 420452, 840904, 1366469, 1681808, 2732938, 5465876, 10931752, 21863504]

約数ペア:

[(1, 21863504), (2, 10931752), (4, 5465876), (8, 2732938), (13, 1681808), (16, 1366469), (26, 840904), (52, 420452), (104, 210226), (208, 105113), (257, 85072), (409, 53456), (514, 42536), (818, 26728), (1028, 21268), (1636, 13364), (2056, 10634), (3272, 6682), (3341, 6544), (4112, 5317)]