28754120

素因数分解:

$2^3\times 5^1\times {\mathrm{41}}^1\times {\mathrm{89}}^1\times {\mathrm{197}}^1$

素因数の和:338

約数の個数: 64

約数和(自身を含む): 67359600

約数和(自身を除く): 38605480

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 41, 82, 89, 164, 178, 197, 205, 328, 356, 394, 410, 445, 712, 788, 820, 890, 985, 1576, 1640, 1780, 1970, 3560, 3649, 3940, 7298, 7880, 8077, 14596, 16154, 17533, 18245, 29192, 32308, 35066, 36490, 40385, 64616, 70132, 72980, 80770, 87665, 140264, 145960, 161540, 175330, 323080, 350660, 701320, 718853, 1437706, 2875412, 3594265, 5750824, 7188530, 14377060, 28754120]

約数ペア:

[(1, 28754120), (2, 14377060), (4, 7188530), (5, 5750824), (8, 3594265), (10, 2875412), (20, 1437706), (40, 718853), (41, 701320), (82, 350660), (89, 323080), (164, 175330), (178, 161540), (197, 145960), (205, 140264), (328, 87665), (356, 80770), (394, 72980), (410, 70132), (445, 64616), (712, 40385), (788, 36490), (820, 35066), (890, 32308), (985, 29192), (1576, 18245), (1640, 17533), (1780, 16154), (1970, 14596), (3560, 8077), (3649, 7880), (3940, 7298)]