20921784765

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{13931}}^1\times {\mathrm{14303}}^1$

素因数の和:28249

約数の個数: 32

約数和(自身を含む): 38262398976

約数和(自身を除く): 17340614211

約数列:

[1, 3, 5, 7, 15, 21, 35, 105, 13931, 14303, 41793, 42909, 69655, 71515, 97517, 100121, 208965, 214545, 292551, 300363, 487585, 500605, 1462755, 1501815, 199255093, 597765279, 996275465, 1394785651, 2988826395, 4184356953, 6973928255, 20921784765]

約数ペア:

[(1, 20921784765), (3, 6973928255), (5, 4184356953), (7, 2988826395), (15, 1394785651), (21, 996275465), (35, 597765279), (105, 199255093), (13931, 1501815), (14303, 1462755), (41793, 500605), (42909, 487585), (69655, 300363), (71515, 292551), (97517, 214545), (100121, 208965)]