20961490

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{6571}}^1$

素因数の和:6618

約数の個数: 32

約数和(自身を含む): 42586560

約数和(自身を除く): 21625070

約数列:

[1, 2, 5, 10, 11, 22, 29, 55, 58, 110, 145, 290, 319, 638, 1595, 3190, 6571, 13142, 32855, 65710, 72281, 144562, 190559, 361405, 381118, 722810, 952795, 1905590, 2096149, 4192298, 10480745, 20961490]

約数ペア:

[(1, 20961490), (2, 10480745), (5, 4192298), (10, 2096149), (11, 1905590), (22, 952795), (29, 722810), (55, 381118), (58, 361405), (110, 190559), (145, 144562), (290, 72281), (319, 65710), (638, 32855), (1595, 13142), (3190, 6571)]