21658556

素因数分解:

$2^2\times {\mathrm{19}}^2\times {\mathrm{53}}^1\times {\mathrm{283}}^1$

素因数の和:378

約数の個数: 36

約数和(自身を含む): 40901112

約数和(自身を除く): 19242556

約数列:

[1, 2, 4, 19, 38, 53, 76, 106, 212, 283, 361, 566, 722, 1007, 1132, 1444, 2014, 4028, 5377, 10754, 14999, 19133, 21508, 29998, 38266, 59996, 76532, 102163, 204326, 284981, 408652, 569962, 1139924, 5414639, 10829278, 21658556]

約数ペア:

[(1, 21658556), (2, 10829278), (4, 5414639), (19, 1139924), (38, 569962), (53, 408652), (76, 284981), (106, 204326), (212, 102163), (283, 76532), (361, 59996), (566, 38266), (722, 29998), (1007, 21508), (1132, 19133), (1444, 14999), (2014, 10754), (4028, 5377)]