21127905

素因数分解:

$3^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{8237}}^1$

素因数の和:8270

約数の個数: 32

約数和(自身を含む): 39542400

約数和(自身を除く): 18414495

約数列:

[1, 3, 5, 9, 15, 19, 27, 45, 57, 95, 135, 171, 285, 513, 855, 2565, 8237, 24711, 41185, 74133, 123555, 156503, 222399, 370665, 469509, 782515, 1111995, 1408527, 2347545, 4225581, 7042635, 21127905]

約数ペア:

[(1, 21127905), (3, 7042635), (5, 4225581), (9, 2347545), (15, 1408527), (19, 1111995), (27, 782515), (45, 469509), (57, 370665), (95, 222399), (135, 156503), (171, 123555), (285, 74133), (513, 41185), (855, 24711), (2565, 8237)]