19780828

素因数分解:

$2^2\times {\mathrm{23}}^1\times {\mathrm{211}}^1\times {\mathrm{1019}}^1$

素因数の和:1257

約数の個数: 24

約数和(自身を含む): 36328320

約数和(自身を除く): 16547492

約数列:

[1, 2, 4, 23, 46, 92, 211, 422, 844, 1019, 2038, 4076, 4853, 9706, 19412, 23437, 46874, 93748, 215009, 430018, 860036, 4945207, 9890414, 19780828]

約数ペア:

[(1, 19780828), (2, 9890414), (4, 4945207), (23, 860036), (46, 430018), (92, 215009), (211, 93748), (422, 46874), (844, 23437), (1019, 19412), (2038, 9706), (4076, 4853)]