21253485

素因数分解:

$3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{7577}}^1$

素因数の和:7613

約数の個数: 32

約数和(自身を含む): 39284352

約数和(自身を除く): 18030867

約数列:

[1, 3, 5, 11, 15, 17, 33, 51, 55, 85, 165, 187, 255, 561, 935, 2805, 7577, 22731, 37885, 83347, 113655, 128809, 250041, 386427, 416735, 644045, 1250205, 1416899, 1932135, 4250697, 7084495, 21253485]

約数ペア:

[(1, 21253485), (3, 7084495), (5, 4250697), (11, 1932135), (15, 1416899), (17, 1250205), (33, 644045), (51, 416735), (55, 386427), (85, 250041), (165, 128809), (187, 113655), (255, 83347), (561, 37885), (935, 22731), (2805, 7577)]