20777380

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{157}}^1\times {\mathrm{509}}^1$

素因数の和:688

約数の個数: 48

約数和(自身を含む): 47381040

約数和(自身を除く): 26603660

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 157, 260, 314, 509, 628, 785, 1018, 1570, 2036, 2041, 2545, 3140, 4082, 5090, 6617, 8164, 10180, 10205, 13234, 20410, 26468, 33085, 40820, 66170, 79913, 132340, 159826, 319652, 399565, 799130, 1038869, 1598260, 2077738, 4155476, 5194345, 10388690, 20777380]

約数ペア:

[(1, 20777380), (2, 10388690), (4, 5194345), (5, 4155476), (10, 2077738), (13, 1598260), (20, 1038869), (26, 799130), (52, 399565), (65, 319652), (130, 159826), (157, 132340), (260, 79913), (314, 66170), (509, 40820), (628, 33085), (785, 26468), (1018, 20410), (1570, 13234), (2036, 10205), (2041, 10180), (2545, 8164), (3140, 6617), (4082, 5090)]