20618985

素因数分解:

$3^1\times 5^1\times {\mathrm{109}}^1\times {\mathrm{12611}}^1$

素因数の和:12728

約数の個数: 16

約数和(自身を含む): 33295680

約数和(自身を除く): 12676695

約数列:

[1, 3, 5, 15, 109, 327, 545, 1635, 12611, 37833, 63055, 189165, 1374599, 4123797, 6872995, 20618985]

約数ペア:

[(1, 20618985), (3, 6872995), (5, 4123797), (15, 1374599), (109, 189165), (327, 63055), (545, 37833), (1635, 12611)]