20390348

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{61}}^1\times {\mathrm{71}}^1\times {\mathrm{107}}^1$

素因数の和:254

約数の個数: 48

約数和(自身を含む): 40497408

約数和(自身を除く): 20107060

約数列:

[1, 2, 4, 11, 22, 44, 61, 71, 107, 122, 142, 214, 244, 284, 428, 671, 781, 1177, 1342, 1562, 2354, 2684, 3124, 4331, 4708, 6527, 7597, 8662, 13054, 15194, 17324, 26108, 30388, 47641, 71797, 83567, 95282, 143594, 167134, 190564, 287188, 334268, 463417, 926834, 1853668, 5097587, 10195174, 20390348]

約数ペア:

[(1, 20390348), (2, 10195174), (4, 5097587), (11, 1853668), (22, 926834), (44, 463417), (61, 334268), (71, 287188), (107, 190564), (122, 167134), (142, 143594), (214, 95282), (244, 83567), (284, 71797), (428, 47641), (671, 30388), (781, 26108), (1177, 17324), (1342, 15194), (1562, 13054), (2354, 8662), (2684, 7597), (3124, 6527), (4331, 4708)]