661440405

素因数分解:

$3^1\times 5^1\times {\mathrm{43}}^1\times {\mathrm{587}}^1\times {\mathrm{1747}}^1$

素因数の和:2385

約数の個数: 32

約数和(自身を含む): 1085382144

約数和(自身を除く): 423941739

約数列:

[1, 3, 5, 15, 43, 129, 215, 587, 645, 1747, 1761, 2935, 5241, 8735, 8805, 25241, 26205, 75121, 75723, 126205, 225363, 375605, 378615, 1025489, 1126815, 3076467, 5127445, 15382335, 44096027, 132288081, 220480135, 661440405]

約数ペア:

[(1, 661440405), (3, 220480135), (5, 132288081), (15, 44096027), (43, 15382335), (129, 5127445), (215, 3076467), (587, 1126815), (645, 1025489), (1747, 378615), (1761, 375605), (2935, 225363), (5241, 126205), (8735, 75723), (8805, 75121), (25241, 26205)]