21386085

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{11981}}^1$

素因数の和:12013

約数の個数: 32

約数和(自身を含む): 41409792

約数和(自身を除く): 20023707

約数列:

[1, 3, 5, 7, 15, 17, 21, 35, 51, 85, 105, 119, 255, 357, 595, 1785, 11981, 35943, 59905, 83867, 179715, 203677, 251601, 419335, 611031, 1018385, 1258005, 1425739, 3055155, 4277217, 7128695, 21386085]

約数ペア:

[(1, 21386085), (3, 7128695), (5, 4277217), (7, 3055155), (15, 1425739), (17, 1258005), (21, 1018385), (35, 611031), (51, 419335), (85, 251601), (105, 203677), (119, 179715), (255, 83867), (357, 59905), (595, 35943), (1785, 11981)]