21500180

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^2\times {\mathrm{6361}}^1$

素因数の和:6396

約数の個数: 36

約数和(自身を含む): 48898332

約数和(自身を除く): 27398152

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 169, 260, 338, 676, 845, 1690, 3380, 6361, 12722, 25444, 31805, 63610, 82693, 127220, 165386, 330772, 413465, 826930, 1075009, 1653860, 2150018, 4300036, 5375045, 10750090, 21500180]

約数ペア:

[(1, 21500180), (2, 10750090), (4, 5375045), (5, 4300036), (10, 2150018), (13, 1653860), (20, 1075009), (26, 826930), (52, 413465), (65, 330772), (130, 165386), (169, 127220), (260, 82693), (338, 63610), (676, 31805), (845, 25444), (1690, 12722), (3380, 6361)]