21308481

素因数分解:

$3^3\times {\mathrm{19}}^1\times {\mathrm{73}}^1\times {\mathrm{569}}^1$

素因数の和:670

約数の個数: 32

約数和(自身を含む): 33744000

約数和(自身を除く): 12435519

約数列:

[1, 3, 9, 19, 27, 57, 73, 171, 219, 513, 569, 657, 1387, 1707, 1971, 4161, 5121, 10811, 12483, 15363, 32433, 37449, 41537, 97299, 124611, 291897, 373833, 789203, 1121499, 2367609, 7102827, 21308481]

約数ペア:

[(1, 21308481), (3, 7102827), (9, 2367609), (19, 1121499), (27, 789203), (57, 373833), (73, 291897), (171, 124611), (219, 97299), (513, 41537), (569, 37449), (657, 32433), (1387, 15363), (1707, 12483), (1971, 10811), (4161, 5121)]