28156780

素因数分解:

$2^2\times 5^1\times {\mathrm{53}}^1\times {\mathrm{101}}^1\times {\mathrm{263}}^1$

素因数の和:426

約数の個数: 48

約数和(自身を含む): 61072704

約数和(自身を除く): 32915924

約数列:

[1, 2, 4, 5, 10, 20, 53, 101, 106, 202, 212, 263, 265, 404, 505, 526, 530, 1010, 1052, 1060, 1315, 2020, 2630, 5260, 5353, 10706, 13939, 21412, 26563, 26765, 27878, 53126, 53530, 55756, 69695, 106252, 107060, 132815, 139390, 265630, 278780, 531260, 1407839, 2815678, 5631356, 7039195, 14078390, 28156780]

約数ペア:

[(1, 28156780), (2, 14078390), (4, 7039195), (5, 5631356), (10, 2815678), (20, 1407839), (53, 531260), (101, 278780), (106, 265630), (202, 139390), (212, 132815), (263, 107060), (265, 106252), (404, 69695), (505, 55756), (526, 53530), (530, 53126), (1010, 27878), (1052, 26765), (1060, 26563), (1315, 21412), (2020, 13939), (2630, 10706), (5260, 5353)]