21489928

素因数分解:

$2^3\times {\mathrm{29}}^1\times {\mathrm{211}}^1\times {\mathrm{439}}^1$

素因数の和:685

約数の個数: 32

約数和(自身を含む): 41976000

約数和(自身を除く): 20486072

約数列:

[1, 2, 4, 8, 29, 58, 116, 211, 232, 422, 439, 844, 878, 1688, 1756, 3512, 6119, 12238, 12731, 24476, 25462, 48952, 50924, 92629, 101848, 185258, 370516, 741032, 2686241, 5372482, 10744964, 21489928]

約数ペア:

[(1, 21489928), (2, 10744964), (4, 5372482), (8, 2686241), (29, 741032), (58, 370516), (116, 185258), (211, 101848), (232, 92629), (422, 50924), (439, 48952), (844, 25462), (878, 24476), (1688, 12731), (1756, 12238), (3512, 6119)]