21760731

素因数分解:

$3^4\times {\mathrm{17}}^1\times {\mathrm{15803}}^1$

素因数の和:15832

約数の個数: 20

約数和(自身を含む): 34421112

約数和(自身を除く): 12660381

約数列:

[1, 3, 9, 17, 27, 51, 81, 153, 459, 1377, 15803, 47409, 142227, 268651, 426681, 805953, 1280043, 2417859, 7253577, 21760731]

約数ペア:

[(1, 21760731), (3, 7253577), (9, 2417859), (17, 1280043), (27, 805953), (51, 426681), (81, 268651), (153, 142227), (459, 47409), (1377, 15803)]