21720328

素因数分解:

$2^3\times 7^2\times {\mathrm{67}}^1\times {\mathrm{827}}^1$

素因数の和:914

約数の個数: 48

約数和(自身を含む): 48139920

約数和(自身を除く): 26419592

約数列:

[1, 2, 4, 7, 8, 14, 28, 49, 56, 67, 98, 134, 196, 268, 392, 469, 536, 827, 938, 1654, 1876, 3283, 3308, 3752, 5789, 6566, 6616, 11578, 13132, 23156, 26264, 40523, 46312, 55409, 81046, 110818, 162092, 221636, 324184, 387863, 443272, 775726, 1551452, 2715041, 3102904, 5430082, 10860164, 21720328]

約数ペア:

[(1, 21720328), (2, 10860164), (4, 5430082), (7, 3102904), (8, 2715041), (14, 1551452), (28, 775726), (49, 443272), (56, 387863), (67, 324184), (98, 221636), (134, 162092), (196, 110818), (268, 81046), (392, 55409), (469, 46312), (536, 40523), (827, 26264), (938, 23156), (1654, 13132), (1876, 11578), (3283, 6616), (3308, 6566), (3752, 5789)]