19816760

素因数分解:

$2^3\times 5^1\times {\mathrm{491}}^1\times {\mathrm{1009}}^1$

素因数の和:1511

約数の個数: 32

約数和(自身を含む): 44722800

約数和(自身を除く): 24906040

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 491, 982, 1009, 1964, 2018, 2455, 3928, 4036, 4910, 5045, 8072, 9820, 10090, 19640, 20180, 40360, 495419, 990838, 1981676, 2477095, 3963352, 4954190, 9908380, 19816760]

約数ペア:

[(1, 19816760), (2, 9908380), (4, 4954190), (5, 3963352), (8, 2477095), (10, 1981676), (20, 990838), (40, 495419), (491, 40360), (982, 20180), (1009, 19640), (1964, 10090), (2018, 9820), (2455, 8072), (3928, 5045), (4036, 4910)]