21285890

素因数分解:

$2^1\times 5^1\times {\mathrm{19}}^1\times {\mathrm{112031}}^1$

素因数の和:112057

約数の個数: 16

約数和(自身を含む): 40331520

約数和(自身を除く): 19045630

約数列:

[1, 2, 5, 10, 19, 38, 95, 190, 112031, 224062, 560155, 1120310, 2128589, 4257178, 10642945, 21285890]

約数ペア:

[(1, 21285890), (2, 10642945), (5, 4257178), (10, 2128589), (19, 1120310), (38, 560155), (95, 224062), (190, 112031)]