20866209

素因数分解:

$3^1\times 7^2\times {\mathrm{13}}^1\times {\mathrm{61}}^1\times {\mathrm{179}}^1$

素因数の和:270

約数の個数: 48

約数和(自身を含む): 35622720

約数和(自身を除く): 14756511

約数列:

[1, 3, 7, 13, 21, 39, 49, 61, 91, 147, 179, 183, 273, 427, 537, 637, 793, 1253, 1281, 1911, 2327, 2379, 2989, 3759, 5551, 6981, 8771, 8967, 10919, 16289, 16653, 26313, 32757, 38857, 48867, 76433, 114023, 116571, 141947, 229299, 342069, 425841, 535031, 993629, 1605093, 2980887, 6955403, 20866209]

約数ペア:

[(1, 20866209), (3, 6955403), (7, 2980887), (13, 1605093), (21, 993629), (39, 535031), (49, 425841), (61, 342069), (91, 229299), (147, 141947), (179, 116571), (183, 114023), (273, 76433), (427, 48867), (537, 38857), (637, 32757), (793, 26313), (1253, 16653), (1281, 16289), (1911, 10919), (2327, 8967), (2379, 8771), (2989, 6981), (3759, 5551)]