21493688

素因数分解:

$2^3\times {\mathrm{71}}^1\times {\mathrm{79}}^1\times {\mathrm{479}}^1$

素因数の和:635

約数の個数: 32

約数和(自身を含む): 41472000

約数和(自身を除く): 19978312

約数列:

[1, 2, 4, 8, 71, 79, 142, 158, 284, 316, 479, 568, 632, 958, 1916, 3832, 5609, 11218, 22436, 34009, 37841, 44872, 68018, 75682, 136036, 151364, 272072, 302728, 2686711, 5373422, 10746844, 21493688]

約数ペア:

[(1, 21493688), (2, 10746844), (4, 5373422), (8, 2686711), (71, 302728), (79, 272072), (142, 151364), (158, 136036), (284, 75682), (316, 68018), (479, 44872), (568, 37841), (632, 34009), (958, 22436), (1916, 11218), (3832, 5609)]