15721937679

素因数分解:

$3^1\times 7^4\times {\mathrm{107}}^1\times {\mathrm{20399}}^1$

素因数の和:20537

約数の個数: 40

約数和(自身を含む): 24684652800

約数和(自身を除く): 8962715121

約数列:

[1, 3, 7, 21, 49, 107, 147, 321, 343, 749, 1029, 2247, 2401, 5243, 7203, 15729, 20399, 36701, 61197, 110103, 142793, 256907, 428379, 770721, 999551, 2182693, 2998653, 6548079, 6996857, 15278851, 20990571, 45836553, 48977999, 106951957, 146933997, 320855871, 748663699, 2245991097, 5240645893, 15721937679]

約数ペア:

[(1, 15721937679), (3, 5240645893), (7, 2245991097), (21, 748663699), (49, 320855871), (107, 146933997), (147, 106951957), (321, 48977999), (343, 45836553), (749, 20990571), (1029, 15278851), (2247, 6996857), (2401, 6548079), (5243, 2998653), (7203, 2182693), (15729, 999551), (20399, 770721), (36701, 428379), (61197, 256907), (110103, 142793)]