20856388

素因数分解:

$2^2\times 7^1\times {\mathrm{61}}^1\times {\mathrm{12211}}^1$

素因数の和:12283

約数の個数: 24

約数和(自身を含む): 42400064

約数和(自身を除く): 21543676

約数列:

[1, 2, 4, 7, 14, 28, 61, 122, 244, 427, 854, 1708, 12211, 24422, 48844, 85477, 170954, 341908, 744871, 1489742, 2979484, 5214097, 10428194, 20856388]

約数ペア:

[(1, 20856388), (2, 10428194), (4, 5214097), (7, 2979484), (14, 1489742), (28, 744871), (61, 341908), (122, 170954), (244, 85477), (427, 48844), (854, 24422), (1708, 12211)]