19980135

素因数分解:

$3^3\times 5^1\times 7^1\times {\mathrm{21143}}^1$

素因数の和:21164

約数の個数: 32

約数和(自身を含む): 40596480

約数和(自身を除く): 20616345

約数列:

[1, 3, 5, 7, 9, 15, 21, 27, 35, 45, 63, 105, 135, 189, 315, 945, 21143, 63429, 105715, 148001, 190287, 317145, 444003, 570861, 740005, 951435, 1332009, 2220015, 2854305, 3996027, 6660045, 19980135]

約数ペア:

[(1, 19980135), (3, 6660045), (5, 3996027), (7, 2854305), (9, 2220015), (15, 1332009), (21, 951435), (27, 740005), (35, 570861), (45, 444003), (63, 317145), (105, 190287), (135, 148001), (189, 105715), (315, 63429), (945, 21143)]