21210340

素因数分解:

$2^2\times 5^1\times {\mathrm{137}}^1\times {\mathrm{7741}}^1$

素因数の和:7887

約数の個数: 24

約数和(自身を含む): 44872632

約数和(自身を除く): 23662292

約数列:

[1, 2, 4, 5, 10, 20, 137, 274, 548, 685, 1370, 2740, 7741, 15482, 30964, 38705, 77410, 154820, 1060517, 2121034, 4242068, 5302585, 10605170, 21210340]

約数ペア:

[(1, 21210340), (2, 10605170), (4, 5302585), (5, 4242068), (10, 2121034), (20, 1060517), (137, 154820), (274, 77410), (548, 38705), (685, 30964), (1370, 15482), (2740, 7741)]