18940905

素因数分解:

$3^3\times 5^1\times {\mathrm{173}}^1\times {\mathrm{811}}^1$

素因数の和:998

約数の個数: 32

約数和(自身を含む): 33909120

約数和(自身を除く): 14968215

約数列:

[1, 3, 5, 9, 15, 27, 45, 135, 173, 519, 811, 865, 1557, 2433, 2595, 4055, 4671, 7299, 7785, 12165, 21897, 23355, 36495, 109485, 140303, 420909, 701515, 1262727, 2104545, 3788181, 6313635, 18940905]

約数ペア:

[(1, 18940905), (3, 6313635), (5, 3788181), (9, 2104545), (15, 1262727), (27, 701515), (45, 420909), (135, 140303), (173, 109485), (519, 36495), (811, 23355), (865, 21897), (1557, 12165), (2433, 7785), (2595, 7299), (4055, 4671)]