20479221

素因数分解:

$3^2\times 7^1\times {\mathrm{173}}^1\times {\mathrm{1879}}^1$

素因数の和:2065

約数の個数: 24

約数和(自身を含む): 34020480

約数和(自身を除く): 13541259

約数列:

[1, 3, 7, 9, 21, 63, 173, 519, 1211, 1557, 1879, 3633, 5637, 10899, 13153, 16911, 39459, 118377, 325067, 975201, 2275469, 2925603, 6826407, 20479221]

約数ペア:

[(1, 20479221), (3, 6826407), (7, 2925603), (9, 2275469), (21, 975201), (63, 325067), (173, 118377), (519, 39459), (1211, 16911), (1557, 13153), (1879, 10899), (3633, 5637)]