21629560

素因数分解:

$2^3\times 5^1\times {\mathrm{137}}^1\times {\mathrm{3947}}^1$

素因数の和:4095

約数の個数: 32

約数和(自身を含む): 49034160

約数和(自身を除く): 27404600

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 137, 274, 548, 685, 1096, 1370, 2740, 3947, 5480, 7894, 15788, 19735, 31576, 39470, 78940, 157880, 540739, 1081478, 2162956, 2703695, 4325912, 5407390, 10814780, 21629560]

約数ペア:

[(1, 21629560), (2, 10814780), (4, 5407390), (5, 4325912), (8, 2703695), (10, 2162956), (20, 1081478), (40, 540739), (137, 157880), (274, 78940), (548, 39470), (685, 31576), (1096, 19735), (1370, 15788), (2740, 7894), (3947, 5480)]