21206565

素因数分解:

$3^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{1459}}^1$

素因数の和:1506

約数の個数: 48

約数和(自身を含む): 40996800

約数和(自身を除く): 19790235

約数列:

[1, 3, 5, 9, 15, 17, 19, 45, 51, 57, 85, 95, 153, 171, 255, 285, 323, 765, 855, 969, 1459, 1615, 2907, 4377, 4845, 7295, 13131, 14535, 21885, 24803, 27721, 65655, 74409, 83163, 124015, 138605, 223227, 249489, 372045, 415815, 471257, 1116135, 1247445, 1413771, 2356285, 4241313, 7068855, 21206565]

約数ペア:

[(1, 21206565), (3, 7068855), (5, 4241313), (9, 2356285), (15, 1413771), (17, 1247445), (19, 1116135), (45, 471257), (51, 415815), (57, 372045), (85, 249489), (95, 223227), (153, 138605), (171, 124015), (255, 83163), (285, 74409), (323, 65655), (765, 27721), (855, 24803), (969, 21885), (1459, 14535), (1615, 13131), (2907, 7295), (4377, 4845)]