20709801

素因数分解:

$3^2\times 7^2\times {\mathrm{151}}^1\times {\mathrm{311}}^1$

素因数の和:482

約数の個数: 36

約数和(自身を含む): 35141184

約数和(自身を除く): 14431383

約数列:

[1, 3, 7, 9, 21, 49, 63, 147, 151, 311, 441, 453, 933, 1057, 1359, 2177, 2799, 3171, 6531, 7399, 9513, 15239, 19593, 22197, 45717, 46961, 66591, 137151, 140883, 328727, 422649, 986181, 2301089, 2958543, 6903267, 20709801]

約数ペア:

[(1, 20709801), (3, 6903267), (7, 2958543), (9, 2301089), (21, 986181), (49, 422649), (63, 328727), (147, 140883), (151, 137151), (311, 66591), (441, 46961), (453, 45717), (933, 22197), (1057, 19593), (1359, 15239), (2177, 9513), (2799, 7399), (3171, 6531)]