19690004

素因数分解:

$2^2\times {\mathrm{19}}^1\times {\mathrm{41}}^1\times {\mathrm{71}}^1\times {\mathrm{89}}^1$

素因数の和:224

約数の個数: 48

約数和(自身を含む): 38102400

約数和(自身を除く): 18412396

約数列:

[1, 2, 4, 19, 38, 41, 71, 76, 82, 89, 142, 164, 178, 284, 356, 779, 1349, 1558, 1691, 2698, 2911, 3116, 3382, 3649, 5396, 5822, 6319, 6764, 7298, 11644, 12638, 14596, 25276, 55309, 69331, 110618, 120061, 138662, 221236, 240122, 259079, 277324, 480244, 518158, 1036316, 4922501, 9845002, 19690004]

約数ペア:

[(1, 19690004), (2, 9845002), (4, 4922501), (19, 1036316), (38, 518158), (41, 480244), (71, 277324), (76, 259079), (82, 240122), (89, 221236), (142, 138662), (164, 120061), (178, 110618), (284, 69331), (356, 55309), (779, 25276), (1349, 14596), (1558, 12638), (1691, 11644), (2698, 7298), (2911, 6764), (3116, 6319), (3382, 5822), (3649, 5396)]