21144277

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{29}}^1\times {\mathrm{557}}^1$

素因数の和:621

約数の個数: 32

約数和(自身を含む): 28926720

約数和(自身を除く): 7782443

約数列:

[1, 7, 11, 17, 29, 77, 119, 187, 203, 319, 493, 557, 1309, 2233, 3451, 3899, 5423, 6127, 9469, 16153, 37961, 42889, 66283, 104159, 113071, 177683, 274601, 729113, 1243781, 1922207, 3020611, 21144277]

約数ペア:

[(1, 21144277), (7, 3020611), (11, 1922207), (17, 1243781), (29, 729113), (77, 274601), (119, 177683), (187, 113071), (203, 104159), (319, 66283), (493, 42889), (557, 37961), (1309, 16153), (2233, 9469), (3451, 6127), (3899, 5423)]