18900140

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{127}}^1\times {\mathrm{1063}}^1$

素因数の和:1206

約数の個数: 48

約数和(自身を含む): 45760512

約数和(自身を除く): 26860372

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 127, 140, 254, 508, 635, 889, 1063, 1270, 1778, 2126, 2540, 3556, 4252, 4445, 5315, 7441, 8890, 10630, 14882, 17780, 21260, 29764, 37205, 74410, 135001, 148820, 270002, 540004, 675005, 945007, 1350010, 1890014, 2700020, 3780028, 4725035, 9450070, 18900140]

約数ペア:

[(1, 18900140), (2, 9450070), (4, 4725035), (5, 3780028), (7, 2700020), (10, 1890014), (14, 1350010), (20, 945007), (28, 675005), (35, 540004), (70, 270002), (127, 148820), (140, 135001), (254, 74410), (508, 37205), (635, 29764), (889, 21260), (1063, 17780), (1270, 14882), (1778, 10630), (2126, 8890), (2540, 7441), (3556, 5315), (4252, 4445)]