21290715

素因数分解:

$3^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{9277}}^1$

素因数の和:9308

約数の個数: 32

約数和(自身を含む): 40080960

約数和(自身を除く): 18790245

約数列:

[1, 3, 5, 9, 15, 17, 27, 45, 51, 85, 135, 153, 255, 459, 765, 2295, 9277, 27831, 46385, 83493, 139155, 157709, 250479, 417465, 473127, 788545, 1252395, 1419381, 2365635, 4258143, 7096905, 21290715]

約数ペア:

[(1, 21290715), (3, 7096905), (5, 4258143), (9, 2365635), (15, 1419381), (17, 1252395), (27, 788545), (45, 473127), (51, 417465), (85, 250479), (135, 157709), (153, 139155), (255, 83493), (459, 46385), (765, 27831), (2295, 9277)]