21191175

素因数分解:

$3^2\times 5^2\times {\mathrm{19}}^1\times {\mathrm{4957}}^1$

素因数の和:4992

約数の個数: 36

約数和(自身を含む): 39961480

約数和(自身を除く): 18770305

約数列:

[1, 3, 5, 9, 15, 19, 25, 45, 57, 75, 95, 171, 225, 285, 475, 855, 1425, 4275, 4957, 14871, 24785, 44613, 74355, 94183, 123925, 223065, 282549, 371775, 470915, 847647, 1115325, 1412745, 2354575, 4238235, 7063725, 21191175]

約数ペア:

[(1, 21191175), (3, 7063725), (5, 4238235), (9, 2354575), (15, 1412745), (19, 1115325), (25, 847647), (45, 470915), (57, 371775), (75, 282549), (95, 223065), (171, 123925), (225, 94183), (285, 74355), (475, 44613), (855, 24785), (1425, 14871), (4275, 4957)]