20895147

素因数分解:

$3^2\times 7^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{823}}^1$

素因数の和:880

約数の個数: 48

約数和(自身を含む): 38391808

約数和(自身を除く): 17496661

約数列:

[1, 3, 7, 9, 13, 21, 31, 39, 63, 91, 93, 117, 217, 273, 279, 403, 651, 819, 823, 1209, 1953, 2469, 2821, 3627, 5761, 7407, 8463, 10699, 17283, 25389, 25513, 32097, 51849, 74893, 76539, 96291, 178591, 224679, 229617, 331669, 535773, 674037, 995007, 1607319, 2321683, 2985021, 6965049, 20895147]

約数ペア:

[(1, 20895147), (3, 6965049), (7, 2985021), (9, 2321683), (13, 1607319), (21, 995007), (31, 674037), (39, 535773), (63, 331669), (91, 229617), (93, 224679), (117, 178591), (217, 96291), (273, 76539), (279, 74893), (403, 51849), (651, 32097), (819, 25513), (823, 25389), (1209, 17283), (1953, 10699), (2469, 8463), (2821, 7407), (3627, 5761)]