19860680

素因数分解:

$2^3\times 5^1\times 7^2\times {\mathrm{10133}}^1$

素因数の和:10158

約数の個数: 48

約数和(自身を含む): 51987420

約数和(自身を除く): 32126740

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 49, 56, 70, 98, 140, 196, 245, 280, 392, 490, 980, 1960, 10133, 20266, 40532, 50665, 70931, 81064, 101330, 141862, 202660, 283724, 354655, 405320, 496517, 567448, 709310, 993034, 1418620, 1986068, 2482585, 2837240, 3972136, 4965170, 9930340, 19860680]

約数ペア:

[(1, 19860680), (2, 9930340), (4, 4965170), (5, 3972136), (7, 2837240), (8, 2482585), (10, 1986068), (14, 1418620), (20, 993034), (28, 709310), (35, 567448), (40, 496517), (49, 405320), (56, 354655), (70, 283724), (98, 202660), (140, 141862), (196, 101330), (245, 81064), (280, 70931), (392, 50665), (490, 40532), (980, 20266), (1960, 10133)]