20211075

素因数分解:

$3^2\times 5^2\times {\mathrm{43}}^1\times {\mathrm{2089}}^1$

素因数の和:2148

約数の個数: 36

約数和(自身を含む): 37059880

約数和(自身を除く): 16848805

約数列:

[1, 3, 5, 9, 15, 25, 43, 45, 75, 129, 215, 225, 387, 645, 1075, 1935, 2089, 3225, 6267, 9675, 10445, 18801, 31335, 52225, 89827, 94005, 156675, 269481, 449135, 470025, 808443, 1347405, 2245675, 4042215, 6737025, 20211075]

約数ペア:

[(1, 20211075), (3, 6737025), (5, 4042215), (9, 2245675), (15, 1347405), (25, 808443), (43, 470025), (45, 449135), (75, 269481), (129, 156675), (215, 94005), (225, 89827), (387, 52225), (645, 31335), (1075, 18801), (1935, 10445), (2089, 9675), (3225, 6267)]