21095180

素因数分解:

$2^2\times 5^1\times {\mathrm{29}}^1\times {\mathrm{37}}^1\times {\mathrm{983}}^1$

素因数の和:1058

約数の個数: 48

約数和(自身を含む): 47113920

約数和(自身を除く): 26018740

約数列:

[1, 2, 4, 5, 10, 20, 29, 37, 58, 74, 116, 145, 148, 185, 290, 370, 580, 740, 983, 1073, 1966, 2146, 3932, 4292, 4915, 5365, 9830, 10730, 19660, 21460, 28507, 36371, 57014, 72742, 114028, 142535, 145484, 181855, 285070, 363710, 570140, 727420, 1054759, 2109518, 4219036, 5273795, 10547590, 21095180]

約数ペア:

[(1, 21095180), (2, 10547590), (4, 5273795), (5, 4219036), (10, 2109518), (20, 1054759), (29, 727420), (37, 570140), (58, 363710), (74, 285070), (116, 181855), (145, 145484), (148, 142535), (185, 114028), (290, 72742), (370, 57014), (580, 36371), (740, 28507), (983, 21460), (1073, 19660), (1966, 10730), (2146, 9830), (3932, 5365), (4292, 4915)]