19902645

素因数分解:

$3^3\times 5^1\times 7^1\times {\mathrm{21061}}^1$

素因数の和:21082

約数の個数: 32

約数和(自身を含む): 40439040

約数和(自身を除く): 20536395

約数列:

[1, 3, 5, 7, 9, 15, 21, 27, 35, 45, 63, 105, 135, 189, 315, 945, 21061, 63183, 105305, 147427, 189549, 315915, 442281, 568647, 737135, 947745, 1326843, 2211405, 2843235, 3980529, 6634215, 19902645]

約数ペア:

[(1, 19902645), (3, 6634215), (5, 3980529), (7, 2843235), (9, 2211405), (15, 1326843), (21, 947745), (27, 737135), (35, 568647), (45, 442281), (63, 315915), (105, 189549), (135, 147427), (189, 105305), (315, 63183), (945, 21061)]