20168505

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{43}}^1\times {\mathrm{1489}}^1$

素因数の和:1550

約数の個数: 48

約数和(自身を含む): 40909440

約数和(自身を除く): 20740935

約数列:

[1, 3, 5, 7, 9, 15, 21, 35, 43, 45, 63, 105, 129, 215, 301, 315, 387, 645, 903, 1489, 1505, 1935, 2709, 4467, 4515, 7445, 10423, 13401, 13545, 22335, 31269, 52115, 64027, 67005, 93807, 156345, 192081, 320135, 448189, 469035, 576243, 960405, 1344567, 2240945, 2881215, 4033701, 6722835, 20168505]

約数ペア:

[(1, 20168505), (3, 6722835), (5, 4033701), (7, 2881215), (9, 2240945), (15, 1344567), (21, 960405), (35, 576243), (43, 469035), (45, 448189), (63, 320135), (105, 192081), (129, 156345), (215, 93807), (301, 67005), (315, 64027), (387, 52115), (645, 31269), (903, 22335), (1489, 13545), (1505, 13401), (1935, 10423), (2709, 7445), (4467, 4515)]