15880221

素因数分解:

$3^2\times 7^1\times {\mathrm{443}}^1\times {\mathrm{569}}^1$

素因数の和:1025

約数の個数: 24

約数和(自身を含む): 26320320

約数和(自身を除く): 10440099

約数列:

[1, 3, 7, 9, 21, 63, 443, 569, 1329, 1707, 3101, 3983, 3987, 5121, 9303, 11949, 27909, 35847, 252067, 756201, 1764469, 2268603, 5293407, 15880221]

約数ペア:

[(1, 15880221), (3, 5293407), (7, 2268603), (9, 1764469), (21, 756201), (63, 252067), (443, 35847), (569, 27909), (1329, 11949), (1707, 9303), (3101, 5121), (3983, 3987)]