21787047

素因数分解:

$3^2\times {\mathrm{17}}^1\times {\mathrm{157}}^1\times {\mathrm{907}}^1$

素因数の和:1087

約数の個数: 24

約数和(自身を含む): 33570576

約数和(自身を除く): 11783529

約数列:

[1, 3, 9, 17, 51, 153, 157, 471, 907, 1413, 2669, 2721, 8007, 8163, 15419, 24021, 46257, 138771, 142399, 427197, 1281591, 2420783, 7262349, 21787047]

約数ペア:

[(1, 21787047), (3, 7262349), (9, 2420783), (17, 1281591), (51, 427197), (153, 142399), (157, 138771), (471, 46257), (907, 24021), (1413, 15419), (2669, 8163), (2721, 8007)]