20161540

素因数分解:

$2^2\times 5^1\times 7^3\times {\mathrm{2939}}^1$

素因数の和:2969

約数の個数: 48

約数和(自身を含む): 49392000

約数和(自身を除く): 29230460

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 70, 98, 140, 196, 245, 343, 490, 686, 980, 1372, 1715, 2939, 3430, 5878, 6860, 11756, 14695, 20573, 29390, 41146, 58780, 82292, 102865, 144011, 205730, 288022, 411460, 576044, 720055, 1008077, 1440110, 2016154, 2880220, 4032308, 5040385, 10080770, 20161540]

約数ペア:

[(1, 20161540), (2, 10080770), (4, 5040385), (5, 4032308), (7, 2880220), (10, 2016154), (14, 1440110), (20, 1008077), (28, 720055), (35, 576044), (49, 411460), (70, 288022), (98, 205730), (140, 144011), (196, 102865), (245, 82292), (343, 58780), (490, 41146), (686, 29390), (980, 20573), (1372, 14695), (1715, 11756), (2939, 6860), (3430, 5878)]