21121905

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{11833}}^1$

素因数の和:11865

約数の個数: 32

約数和(自身を含む): 40898304

約数和(自身を除く): 19776399

約数列:

[1, 3, 5, 7, 15, 17, 21, 35, 51, 85, 105, 119, 255, 357, 595, 1785, 11833, 35499, 59165, 82831, 177495, 201161, 248493, 414155, 603483, 1005805, 1242465, 1408127, 3017415, 4224381, 7040635, 21121905]

約数ペア:

[(1, 21121905), (3, 7040635), (5, 4224381), (7, 3017415), (15, 1408127), (17, 1242465), (21, 1005805), (35, 603483), (51, 414155), (85, 248493), (105, 201161), (119, 177495), (255, 82831), (357, 59165), (595, 35499), (1785, 11833)]