21338720

素因数分解:

$2^5\times 5^1\times {\mathrm{13}}^1\times {\mathrm{10259}}^1$

素因数の和:10287

約数の個数: 48

約数和(自身を含む): 54295920

約数和(自身を除く): 32957200

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 32, 40, 52, 65, 80, 104, 130, 160, 208, 260, 416, 520, 1040, 2080, 10259, 20518, 41036, 51295, 82072, 102590, 133367, 164144, 205180, 266734, 328288, 410360, 533468, 666835, 820720, 1066936, 1333670, 1641440, 2133872, 2667340, 4267744, 5334680, 10669360, 21338720]

約数ペア:

[(1, 21338720), (2, 10669360), (4, 5334680), (5, 4267744), (8, 2667340), (10, 2133872), (13, 1641440), (16, 1333670), (20, 1066936), (26, 820720), (32, 666835), (40, 533468), (52, 410360), (65, 328288), (80, 266734), (104, 205180), (130, 164144), (160, 133367), (208, 102590), (260, 82072), (416, 51295), (520, 41036), (1040, 20518), (2080, 10259)]