18780777

素因数分解:

$3^2\times {\mathrm{29}}^1\times {\mathrm{47}}^1\times {\mathrm{1531}}^1$

素因数の和:1613

約数の個数: 24

約数和(自身を含む): 28679040

約数和(自身を除く): 9898263

約数列:

[1, 3, 9, 29, 47, 87, 141, 261, 423, 1363, 1531, 4089, 4593, 12267, 13779, 44399, 71957, 133197, 215871, 399591, 647613, 2086753, 6260259, 18780777]

約数ペア:

[(1, 18780777), (3, 6260259), (9, 2086753), (29, 647613), (47, 399591), (87, 215871), (141, 133197), (261, 71957), (423, 44399), (1363, 13779), (1531, 12267), (4089, 4593)]