20993896

素因数分解:

$2^3\times 7^1\times {\mathrm{11}}^1\times {\mathrm{173}}^1\times {\mathrm{197}}^1$

素因数の和:394

約数の個数: 64

約数和(自身を含む): 49610880

約数和(自身を除く): 28616984

約数列:

[1, 2, 4, 7, 8, 11, 14, 22, 28, 44, 56, 77, 88, 154, 173, 197, 308, 346, 394, 616, 692, 788, 1211, 1379, 1384, 1576, 1903, 2167, 2422, 2758, 3806, 4334, 4844, 5516, 7612, 8668, 9688, 11032, 13321, 15169, 15224, 17336, 26642, 30338, 34081, 53284, 60676, 68162, 106568, 121352, 136324, 238567, 272648, 374891, 477134, 749782, 954268, 1499564, 1908536, 2624237, 2999128, 5248474, 10496948, 20993896]

約数ペア:

[(1, 20993896), (2, 10496948), (4, 5248474), (7, 2999128), (8, 2624237), (11, 1908536), (14, 1499564), (22, 954268), (28, 749782), (44, 477134), (56, 374891), (77, 272648), (88, 238567), (154, 136324), (173, 121352), (197, 106568), (308, 68162), (346, 60676), (394, 53284), (616, 34081), (692, 30338), (788, 26642), (1211, 17336), (1379, 15224), (1384, 15169), (1576, 13321), (1903, 11032), (2167, 9688), (2422, 8668), (2758, 7612), (3806, 5516), (4334, 4844)]