21095320

素因数分解:

$2^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{41}}^1\times {\mathrm{677}}^1$

素因数の和:748

約数の個数: 64

約数和(自身を含む): 51256800

約数和(自身を除く): 30161480

約数列:

[1, 2, 4, 5, 8, 10, 19, 20, 38, 40, 41, 76, 82, 95, 152, 164, 190, 205, 328, 380, 410, 677, 760, 779, 820, 1354, 1558, 1640, 2708, 3116, 3385, 3895, 5416, 6232, 6770, 7790, 12863, 13540, 15580, 25726, 27080, 27757, 31160, 51452, 55514, 64315, 102904, 111028, 128630, 138785, 222056, 257260, 277570, 514520, 527383, 555140, 1054766, 1110280, 2109532, 2636915, 4219064, 5273830, 10547660, 21095320]

約数ペア:

[(1, 21095320), (2, 10547660), (4, 5273830), (5, 4219064), (8, 2636915), (10, 2109532), (19, 1110280), (20, 1054766), (38, 555140), (40, 527383), (41, 514520), (76, 277570), (82, 257260), (95, 222056), (152, 138785), (164, 128630), (190, 111028), (205, 102904), (328, 64315), (380, 55514), (410, 51452), (677, 31160), (760, 27757), (779, 27080), (820, 25726), (1354, 15580), (1558, 13540), (1640, 12863), (2708, 7790), (3116, 6770), (3385, 6232), (3895, 5416)]