19688840

素因数分解:

$2^3\times 5^1\times {\mathrm{43}}^1\times {\mathrm{11447}}^1$

素因数の和:11501

約数の個数: 32

約数和(自身を含む): 45334080

約数和(自身を除く): 25645240

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 43, 86, 172, 215, 344, 430, 860, 1720, 11447, 22894, 45788, 57235, 91576, 114470, 228940, 457880, 492221, 984442, 1968884, 2461105, 3937768, 4922210, 9844420, 19688840]

約数ペア:

[(1, 19688840), (2, 9844420), (4, 4922210), (5, 3937768), (8, 2461105), (10, 1968884), (20, 984442), (40, 492221), (43, 457880), (86, 228940), (172, 114470), (215, 91576), (344, 57235), (430, 45788), (860, 22894), (1720, 11447)]