21021028

素因数分解:

$2^2\times 7^1\times {\mathrm{41}}^1\times {\mathrm{18311}}^1$

素因数の和:18363

約数の個数: 24

約数和(自身を含む): 43069824

約数和(自身を除く): 22048796

約数列:

[1, 2, 4, 7, 14, 28, 41, 82, 164, 287, 574, 1148, 18311, 36622, 73244, 128177, 256354, 512708, 750751, 1501502, 3003004, 5255257, 10510514, 21021028]

約数ペア:

[(1, 21021028), (2, 10510514), (4, 5255257), (7, 3003004), (14, 1501502), (28, 750751), (41, 512708), (82, 256354), (164, 128177), (287, 73244), (574, 36622), (1148, 18311)]