21105904

素因数分解:

$2^4\times {\mathrm{23}}^1\times {\mathrm{83}}^1\times {\mathrm{691}}^1$

素因数の和:805

約数の個数: 40

約数和(自身を含む): 43247232

約数和(自身を除く): 22141328

約数列:

[1, 2, 4, 8, 16, 23, 46, 83, 92, 166, 184, 332, 368, 664, 691, 1328, 1382, 1909, 2764, 3818, 5528, 7636, 11056, 15272, 15893, 30544, 31786, 57353, 63572, 114706, 127144, 229412, 254288, 458824, 917648, 1319119, 2638238, 5276476, 10552952, 21105904]

約数ペア:

[(1, 21105904), (2, 10552952), (4, 5276476), (8, 2638238), (16, 1319119), (23, 917648), (46, 458824), (83, 254288), (92, 229412), (166, 127144), (184, 114706), (332, 63572), (368, 57353), (664, 31786), (691, 30544), (1328, 15893), (1382, 15272), (1909, 11056), (2764, 7636), (3818, 5528)]