21540808

素因数分解:

$2^3\times {\mathrm{37}}^1\times {\mathrm{61}}^1\times {\mathrm{1193}}^1$

素因数の和:1297

約数の個数: 32

約数和(自身を含む): 42195960

約数和(自身を除く): 20655152

約数列:

[1, 2, 4, 8, 37, 61, 74, 122, 148, 244, 296, 488, 1193, 2257, 2386, 4514, 4772, 9028, 9544, 18056, 44141, 72773, 88282, 145546, 176564, 291092, 353128, 582184, 2692601, 5385202, 10770404, 21540808]

約数ペア:

[(1, 21540808), (2, 10770404), (4, 5385202), (8, 2692601), (37, 582184), (61, 353128), (74, 291092), (122, 176564), (148, 145546), (244, 88282), (296, 72773), (488, 44141), (1193, 18056), (2257, 9544), (2386, 9028), (4514, 4772)]