21063645

素因数分解:

$3^4\times 5^1\times {\mathrm{52009}}^1$

素因数の和:52026

約数の個数: 20

約数和(自身を含む): 37759260

約数和(自身を除く): 16695615

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 405, 52009, 156027, 260045, 468081, 780135, 1404243, 2340405, 4212729, 7021215, 21063645]

約数ペア:

[(1, 21063645), (3, 7021215), (5, 4212729), (9, 2340405), (15, 1404243), (27, 780135), (45, 468081), (81, 260045), (135, 156027), (405, 52009)]