20778826256

素因数分解:

$2^4\times {\mathrm{61}}^1\times {\mathrm{21289781}}^1$

素因数の和:21289850

約数の個数: 20

約数和(自身を含む): 40918961004

約数和(自身を除く): 20140134748

約数列:

[1, 2, 4, 8, 16, 61, 122, 244, 488, 976, 21289781, 42579562, 85159124, 170318248, 340636496, 1298676641, 2597353282, 5194706564, 10389413128, 20778826256]

約数ペア:

[(1, 20778826256), (2, 10389413128), (4, 5194706564), (8, 2597353282), (16, 1298676641), (61, 340636496), (122, 170318248), (244, 85159124), (488, 42579562), (976, 21289781)]