21057135

素因数分解:

$3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{7507}}^1$

素因数の和:7543

約数の個数: 32

約数和(自身を含む): 38921472

約数和(自身を除く): 17864337

約数列:

[1, 3, 5, 11, 15, 17, 33, 51, 55, 85, 165, 187, 255, 561, 935, 2805, 7507, 22521, 37535, 82577, 112605, 127619, 247731, 382857, 412885, 638095, 1238655, 1403809, 1914285, 4211427, 7019045, 21057135]

約数ペア:

[(1, 21057135), (3, 7019045), (5, 4211427), (11, 1914285), (15, 1403809), (17, 1238655), (33, 638095), (51, 412885), (55, 382857), (85, 247731), (165, 127619), (187, 112605), (255, 82577), (561, 37535), (935, 22521), (2805, 7507)]