21237128

素因数分解:

$2^3\times {\mathrm{11}}^1\times {\mathrm{373}}^1\times {\mathrm{647}}^1$

素因数の和:1037

約数の個数: 32

約数和(自身を含む): 43623360

約数和(自身を除く): 22386232

約数列:

[1, 2, 4, 8, 11, 22, 44, 88, 373, 647, 746, 1294, 1492, 2588, 2984, 4103, 5176, 7117, 8206, 14234, 16412, 28468, 32824, 56936, 241331, 482662, 965324, 1930648, 2654641, 5309282, 10618564, 21237128]

約数ペア:

[(1, 21237128), (2, 10618564), (4, 5309282), (8, 2654641), (11, 1930648), (22, 965324), (44, 482662), (88, 241331), (373, 56936), (647, 32824), (746, 28468), (1294, 16412), (1492, 14234), (2588, 8206), (2984, 7117), (4103, 5176)]