18813781

素因数分解:

$7^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{53}}^1\times {\mathrm{157}}^1$

素因数の和:253

約数の個数: 32

約数和(自身を含む): 24572160

約数和(自身を除く): 5758379

約数列:

[1, 7, 17, 19, 53, 119, 133, 157, 323, 371, 901, 1007, 1099, 2261, 2669, 2983, 6307, 7049, 8321, 17119, 18683, 20881, 50711, 58247, 119833, 141457, 158099, 354977, 990199, 1106693, 2687683, 18813781]

約数ペア:

[(1, 18813781), (7, 2687683), (17, 1106693), (19, 990199), (53, 354977), (119, 158099), (133, 141457), (157, 119833), (323, 58247), (371, 50711), (901, 20881), (1007, 18683), (1099, 17119), (2261, 8321), (2669, 7049), (2983, 6307)]