18712215

素因数分解:

$3^5\times 5^1\times {\mathrm{15401}}^1$

素因数の和:15421

約数の個数: 24

約数和(自身を含む): 33637968

約数和(自身を除く): 14925753

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 243, 405, 1215, 15401, 46203, 77005, 138609, 231015, 415827, 693045, 1247481, 2079135, 3742443, 6237405, 18712215]

約数ペア:

[(1, 18712215), (3, 6237405), (5, 3742443), (9, 2079135), (15, 1247481), (27, 693045), (45, 415827), (81, 231015), (135, 138609), (243, 77005), (405, 46203), (1215, 15401)]