21004528

素因数分解:

$2^4\times {\mathrm{107}}^1\times {\mathrm{12269}}^1$

素因数の和:12384

約数の個数: 20

約数和(自身を含む): 41079960

約数和(自身を除く): 20075432

約数列:

[1, 2, 4, 8, 16, 107, 214, 428, 856, 1712, 12269, 24538, 49076, 98152, 196304, 1312783, 2625566, 5251132, 10502264, 21004528]

約数ペア:

[(1, 21004528), (2, 10502264), (4, 5251132), (8, 2625566), (16, 1312783), (107, 196304), (214, 98152), (428, 49076), (856, 24538), (1712, 12269)]