21749480

素因数分解:

$2^3\times 5^1\times {\mathrm{103}}^1\times {\mathrm{5279}}^1$

素因数の和:5393

約数の個数: 32

約数和(自身を含む): 49420800

約数和(自身を除く): 27671320

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 103, 206, 412, 515, 824, 1030, 2060, 4120, 5279, 10558, 21116, 26395, 42232, 52790, 105580, 211160, 543737, 1087474, 2174948, 2718685, 4349896, 5437370, 10874740, 21749480]

約数ペア:

[(1, 21749480), (2, 10874740), (4, 5437370), (5, 4349896), (8, 2718685), (10, 2174948), (20, 1087474), (40, 543737), (103, 211160), (206, 105580), (412, 52790), (515, 42232), (824, 26395), (1030, 21116), (2060, 10558), (4120, 5279)]