638363980

素因数分解:

$2^2\times 5^1\times {\mathrm{2029}}^1\times {\mathrm{15731}}^1$

素因数の和:17769

約数の個数: 24

約数和(自身を含む): 1341310320

約数和(自身を除く): 702946340

約数列:

[1, 2, 4, 5, 10, 20, 2029, 4058, 8116, 10145, 15731, 20290, 31462, 40580, 62924, 78655, 157310, 314620, 31918199, 63836398, 127672796, 159590995, 319181990, 638363980]

約数ペア:

[(1, 638363980), (2, 319181990), (4, 159590995), (5, 127672796), (10, 63836398), (20, 31918199), (2029, 314620), (4058, 157310), (8116, 78655), (10145, 62924), (15731, 40580), (20290, 31462)]