20981142

素因数分解:

$2^1\times 3^2\times 7^1\times {\mathrm{13}}^1\times {\mathrm{12809}}^1$

素因数の和:12837

約数の個数: 48

約数和(自身を含む): 55954080

約数和(自身を除く): 34972938

約数列:

[1, 2, 3, 6, 7, 9, 13, 14, 18, 21, 26, 39, 42, 63, 78, 91, 117, 126, 182, 234, 273, 546, 819, 1638, 12809, 25618, 38427, 76854, 89663, 115281, 166517, 179326, 230562, 268989, 333034, 499551, 537978, 806967, 999102, 1165619, 1498653, 1613934, 2331238, 2997306, 3496857, 6993714, 10490571, 20981142]

約数ペア:

[(1, 20981142), (2, 10490571), (3, 6993714), (6, 3496857), (7, 2997306), (9, 2331238), (13, 1613934), (14, 1498653), (18, 1165619), (21, 999102), (26, 806967), (39, 537978), (42, 499551), (63, 333034), (78, 268989), (91, 230562), (117, 179326), (126, 166517), (182, 115281), (234, 89663), (273, 76854), (546, 38427), (819, 25618), (1638, 12809)]