19855900

素因数分解:

$2^2\times 5^2\times {\mathrm{23}}^1\times {\mathrm{89}}^1\times {\mathrm{97}}^1$

素因数の和:223

約数の個数: 72

約数和(自身を含む): 45934560

約数和(自身を除く): 26078660

約数列:

[1, 2, 4, 5, 10, 20, 23, 25, 46, 50, 89, 92, 97, 100, 115, 178, 194, 230, 356, 388, 445, 460, 485, 575, 890, 970, 1150, 1780, 1940, 2047, 2225, 2231, 2300, 2425, 4094, 4450, 4462, 4850, 8188, 8633, 8900, 8924, 9700, 10235, 11155, 17266, 20470, 22310, 34532, 40940, 43165, 44620, 51175, 55775, 86330, 102350, 111550, 172660, 198559, 204700, 215825, 223100, 397118, 431650, 794236, 863300, 992795, 1985590, 3971180, 4963975, 9927950, 19855900]

約数ペア:

[(1, 19855900), (2, 9927950), (4, 4963975), (5, 3971180), (10, 1985590), (20, 992795), (23, 863300), (25, 794236), (46, 431650), (50, 397118), (89, 223100), (92, 215825), (97, 204700), (100, 198559), (115, 172660), (178, 111550), (194, 102350), (230, 86330), (356, 55775), (388, 51175), (445, 44620), (460, 43165), (485, 40940), (575, 34532), (890, 22310), (970, 20470), (1150, 17266), (1780, 11155), (1940, 10235), (2047, 9700), (2225, 8924), (2231, 8900), (2300, 8633), (2425, 8188), (4094, 4850), (4450, 4462)]