18271280

素因数分解:

$2^4\times 5^1\times {\mathrm{353}}^1\times {\mathrm{647}}^1$

素因数の和:1013

約数の個数: 40

約数和(自身を含む): 42666912

約数和(自身を除く): 24395632

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 353, 647, 706, 1294, 1412, 1765, 2588, 2824, 3235, 3530, 5176, 5648, 6470, 7060, 10352, 12940, 14120, 25880, 28240, 51760, 228391, 456782, 913564, 1141955, 1827128, 2283910, 3654256, 4567820, 9135640, 18271280]

約数ペア:

[(1, 18271280), (2, 9135640), (4, 4567820), (5, 3654256), (8, 2283910), (10, 1827128), (16, 1141955), (20, 913564), (40, 456782), (80, 228391), (353, 51760), (647, 28240), (706, 25880), (1294, 14120), (1412, 12940), (1765, 10352), (2588, 7060), (2824, 6470), (3235, 5648), (3530, 5176)]