21070731

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{43}}^1\times {\mathrm{479}}^1$

素因数の和:567

約数の個数: 32

約数和(自身を含む): 32440320

約数和(自身を除く): 11369589

約数列:

[1, 3, 11, 31, 33, 43, 93, 129, 341, 473, 479, 1023, 1333, 1419, 1437, 3999, 5269, 14663, 14849, 15807, 20597, 43989, 44547, 61791, 163339, 226567, 490017, 638507, 679701, 1915521, 7023577, 21070731]

約数ペア:

[(1, 21070731), (3, 7023577), (11, 1915521), (31, 679701), (33, 638507), (43, 490017), (93, 226567), (129, 163339), (341, 61791), (473, 44547), (479, 43989), (1023, 20597), (1333, 15807), (1419, 14849), (1437, 14663), (3999, 5269)]