19967979

素因数分解:

$3^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{29}}^1\times {\mathrm{587}}^1$

素因数の和:659

約数の個数: 32

約数和(自身を含む): 30481920

約数和(自身を除く): 10513941

約数列:

[1, 3, 17, 23, 29, 51, 69, 87, 391, 493, 587, 667, 1173, 1479, 1761, 2001, 9979, 11339, 13501, 17023, 29937, 34017, 40503, 51069, 229517, 289391, 391529, 688551, 868173, 1174587, 6655993, 19967979]

約数ペア:

[(1, 19967979), (3, 6655993), (17, 1174587), (23, 868173), (29, 688551), (51, 391529), (69, 289391), (87, 229517), (391, 51069), (493, 40503), (587, 34017), (667, 29937), (1173, 17023), (1479, 13501), (1761, 11339), (2001, 9979)]