16721980

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{2621}}^1$

素因数の和:2670

約数の個数: 48

約数和(自身を含む): 39644640

約数和(自身を除く): 22922660

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 29, 44, 55, 58, 110, 116, 145, 220, 290, 319, 580, 638, 1276, 1595, 2621, 3190, 5242, 6380, 10484, 13105, 26210, 28831, 52420, 57662, 76009, 115324, 144155, 152018, 288310, 304036, 380045, 576620, 760090, 836099, 1520180, 1672198, 3344396, 4180495, 8360990, 16721980]

約数ペア:

[(1, 16721980), (2, 8360990), (4, 4180495), (5, 3344396), (10, 1672198), (11, 1520180), (20, 836099), (22, 760090), (29, 576620), (44, 380045), (55, 304036), (58, 288310), (110, 152018), (116, 144155), (145, 115324), (220, 76009), (290, 57662), (319, 52420), (580, 28831), (638, 26210), (1276, 13105), (1595, 10484), (2621, 6380), (3190, 5242)]