81988040

素因数分解:

$2^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{233}}^1\times {\mathrm{463}}^1$

素因数の和:726

約数の個数: 64

約数和(自身を含む): 195436800

約数和(自身を除く): 113448760

約数列:

[1, 2, 4, 5, 8, 10, 19, 20, 38, 40, 76, 95, 152, 190, 233, 380, 463, 466, 760, 926, 932, 1165, 1852, 1864, 2315, 2330, 3704, 4427, 4630, 4660, 8797, 8854, 9260, 9320, 17594, 17708, 18520, 22135, 35188, 35416, 43985, 44270, 70376, 87970, 88540, 107879, 175940, 177080, 215758, 351880, 431516, 539395, 863032, 1078790, 2049701, 2157580, 4099402, 4315160, 8198804, 10248505, 16397608, 20497010, 40994020, 81988040]

約数ペア:

[(1, 81988040), (2, 40994020), (4, 20497010), (5, 16397608), (8, 10248505), (10, 8198804), (19, 4315160), (20, 4099402), (38, 2157580), (40, 2049701), (76, 1078790), (95, 863032), (152, 539395), (190, 431516), (233, 351880), (380, 215758), (463, 177080), (466, 175940), (760, 107879), (926, 88540), (932, 87970), (1165, 70376), (1852, 44270), (1864, 43985), (2315, 35416), (2330, 35188), (3704, 22135), (4427, 18520), (4630, 17708), (4660, 17594), (8797, 9320), (8854, 9260)]