20990512

素因数分解:

$2^4\times {\mathrm{17}}^1\times {\mathrm{77171}}^1$

素因数の和:77196

約数の個数: 20

約数和(自身を含む): 43061976

約数和(自身を除く): 22071464

約数列:

[1, 2, 4, 8, 16, 17, 34, 68, 136, 272, 77171, 154342, 308684, 617368, 1234736, 1311907, 2623814, 5247628, 10495256, 20990512]

約数ペア:

[(1, 20990512), (2, 10495256), (4, 5247628), (8, 2623814), (16, 1311907), (17, 1234736), (34, 617368), (68, 308684), (136, 154342), (272, 77171)]