21221564

素因数分解:

$2^2\times 7^1\times {\mathrm{13}}^1\times {\mathrm{173}}^1\times {\mathrm{337}}^1$

素因数の和:534

約数の個数: 48

約数和(自身を含む): 46108608

約数和(自身を除く): 24887044

約数列:

[1, 2, 4, 7, 13, 14, 26, 28, 52, 91, 173, 182, 337, 346, 364, 674, 692, 1211, 1348, 2249, 2359, 2422, 4381, 4498, 4718, 4844, 8762, 8996, 9436, 15743, 17524, 30667, 31486, 58301, 61334, 62972, 116602, 122668, 233204, 408107, 757913, 816214, 1515826, 1632428, 3031652, 5305391, 10610782, 21221564]

約数ペア:

[(1, 21221564), (2, 10610782), (4, 5305391), (7, 3031652), (13, 1632428), (14, 1515826), (26, 816214), (28, 757913), (52, 408107), (91, 233204), (173, 122668), (182, 116602), (337, 62972), (346, 61334), (364, 58301), (674, 31486), (692, 30667), (1211, 17524), (1348, 15743), (2249, 9436), (2359, 8996), (2422, 8762), (4381, 4844), (4498, 4718)]