18686780

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{127}}^1\times {\mathrm{1051}}^1$

素因数の和:1194

約数の個数: 48

約数和(自身を含む): 45244416

約数和(自身を除く): 26557636

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 127, 140, 254, 508, 635, 889, 1051, 1270, 1778, 2102, 2540, 3556, 4204, 4445, 5255, 7357, 8890, 10510, 14714, 17780, 21020, 29428, 36785, 73570, 133477, 147140, 266954, 533908, 667385, 934339, 1334770, 1868678, 2669540, 3737356, 4671695, 9343390, 18686780]

約数ペア:

[(1, 18686780), (2, 9343390), (4, 4671695), (5, 3737356), (7, 2669540), (10, 1868678), (14, 1334770), (20, 934339), (28, 667385), (35, 533908), (70, 266954), (127, 147140), (140, 133477), (254, 73570), (508, 36785), (635, 29428), (889, 21020), (1051, 17780), (1270, 14714), (1778, 10510), (2102, 8890), (2540, 7357), (3556, 5255), (4204, 4445)]