21194415

素因数分解:

$3^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{47}}^1\times {\mathrm{911}}^1$

素因数の和:980

約数の個数: 48

約数和(自身を含む): 40974336

約数和(自身を除く): 19779921

約数列:

[1, 3, 5, 9, 11, 15, 33, 45, 47, 55, 99, 141, 165, 235, 423, 495, 517, 705, 911, 1551, 2115, 2585, 2733, 4555, 4653, 7755, 8199, 10021, 13665, 23265, 30063, 40995, 42817, 50105, 90189, 128451, 150315, 214085, 385353, 450945, 470987, 642255, 1412961, 1926765, 2354935, 4238883, 7064805, 21194415]

約数ペア:

[(1, 21194415), (3, 7064805), (5, 4238883), (9, 2354935), (11, 1926765), (15, 1412961), (33, 642255), (45, 470987), (47, 450945), (55, 385353), (99, 214085), (141, 150315), (165, 128451), (235, 90189), (423, 50105), (495, 42817), (517, 40995), (705, 30063), (911, 23265), (1551, 13665), (2115, 10021), (2585, 8199), (2733, 7755), (4555, 4653)]