21198105

素因数分解:

$3^5\times 5^1\times {\mathrm{73}}^1\times {\mathrm{239}}^1$

素因数の和:332

約数の個数: 48

約数和(自身を含む): 38787840

約数和(自身を除く): 17589735

約数列:

[1, 3, 5, 9, 15, 27, 45, 73, 81, 135, 219, 239, 243, 365, 405, 657, 717, 1095, 1195, 1215, 1971, 2151, 3285, 3585, 5913, 6453, 9855, 10755, 17447, 17739, 19359, 29565, 32265, 52341, 58077, 87235, 88695, 96795, 157023, 261705, 290385, 471069, 785115, 1413207, 2355345, 4239621, 7066035, 21198105]

約数ペア:

[(1, 21198105), (3, 7066035), (5, 4239621), (9, 2355345), (15, 1413207), (27, 785115), (45, 471069), (73, 290385), (81, 261705), (135, 157023), (219, 96795), (239, 88695), (243, 87235), (365, 58077), (405, 52341), (657, 32265), (717, 29565), (1095, 19359), (1195, 17739), (1215, 17447), (1971, 10755), (2151, 9855), (3285, 6453), (3585, 5913)]