21779668

素因数分解:

$2^2\times {\mathrm{79}}^1\times {\mathrm{157}}^1\times {\mathrm{439}}^1$

素因数の和:679

約数の個数: 24

約数和(自身を含む): 38931200

約数和(自身を除く): 17151532

約数列:

[1, 2, 4, 79, 157, 158, 314, 316, 439, 628, 878, 1756, 12403, 24806, 34681, 49612, 68923, 69362, 137846, 138724, 275692, 5444917, 10889834, 21779668]

約数ペア:

[(1, 21779668), (2, 10889834), (4, 5444917), (79, 275692), (157, 138724), (158, 137846), (314, 69362), (316, 68923), (439, 49612), (628, 34681), (878, 24806), (1756, 12403)]