20516055

素因数分解:

$3^1\times 5^1\times 7^2\times {\mathrm{103}}^1\times {\mathrm{271}}^1$

素因数の和:396

約数の個数: 48

約数和(自身を含む): 38697984

約数和(自身を除く): 18181929

約数列:

[1, 3, 5, 7, 15, 21, 35, 49, 103, 105, 147, 245, 271, 309, 515, 721, 735, 813, 1355, 1545, 1897, 2163, 3605, 4065, 5047, 5691, 9485, 10815, 13279, 15141, 25235, 27913, 28455, 39837, 66395, 75705, 83739, 139565, 195391, 199185, 418695, 586173, 976955, 1367737, 2930865, 4103211, 6838685, 20516055]

約数ペア:

[(1, 20516055), (3, 6838685), (5, 4103211), (7, 2930865), (15, 1367737), (21, 976955), (35, 586173), (49, 418695), (103, 199185), (105, 195391), (147, 139565), (245, 83739), (271, 75705), (309, 66395), (515, 39837), (721, 28455), (735, 27913), (813, 25235), (1355, 15141), (1545, 13279), (1897, 10815), (2163, 9485), (3605, 5691), (4065, 5047)]