20397993

素因数分解:

$3^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{227}}^1\times {\mathrm{389}}^1$

素因数の和:637

約数の個数: 32

約数和(自身を含む): 34145280

約数和(自身を除く): 13747287

約数列:

[1, 3, 7, 11, 21, 33, 77, 227, 231, 389, 681, 1167, 1589, 2497, 2723, 4279, 4767, 7491, 8169, 12837, 17479, 29953, 52437, 88303, 89859, 264909, 618121, 971333, 1854363, 2913999, 6799331, 20397993]

約数ペア:

[(1, 20397993), (3, 6799331), (7, 2913999), (11, 1854363), (21, 971333), (33, 618121), (77, 264909), (227, 89859), (231, 88303), (389, 52437), (681, 29953), (1167, 17479), (1589, 12837), (2497, 8169), (2723, 7491), (4279, 4767)]