9901720

素因数分解:

$2^3\times 5^1\times {\mathrm{73}}^1\times {\mathrm{3391}}^1$

素因数の和:3475

約数の個数: 32

約数和(自身を含む): 22590720

約数和(自身を除く): 12689000

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 73, 146, 292, 365, 584, 730, 1460, 2920, 3391, 6782, 13564, 16955, 27128, 33910, 67820, 135640, 247543, 495086, 990172, 1237715, 1980344, 2475430, 4950860, 9901720]

約数ペア:

[(1, 9901720), (2, 4950860), (4, 2475430), (5, 1980344), (8, 1237715), (10, 990172), (20, 495086), (40, 247543), (73, 135640), (146, 67820), (292, 33910), (365, 27128), (584, 16955), (730, 13564), (1460, 6782), (2920, 3391)]