21992500

素因数分解:

$2^2\times 5^4\times {\mathrm{19}}^1\times {\mathrm{463}}^1$

素因数の和:506

約数の個数: 60

約数和(自身を含む): 50733760

約数和(自身を除く): 28741260

約数列:

[1, 2, 4, 5, 10, 19, 20, 25, 38, 50, 76, 95, 100, 125, 190, 250, 380, 463, 475, 500, 625, 926, 950, 1250, 1852, 1900, 2315, 2375, 2500, 4630, 4750, 8797, 9260, 9500, 11575, 11875, 17594, 23150, 23750, 35188, 43985, 46300, 47500, 57875, 87970, 115750, 175940, 219925, 231500, 289375, 439850, 578750, 879700, 1099625, 1157500, 2199250, 4398500, 5498125, 10996250, 21992500]

約数ペア:

[(1, 21992500), (2, 10996250), (4, 5498125), (5, 4398500), (10, 2199250), (19, 1157500), (20, 1099625), (25, 879700), (38, 578750), (50, 439850), (76, 289375), (95, 231500), (100, 219925), (125, 175940), (190, 115750), (250, 87970), (380, 57875), (463, 47500), (475, 46300), (500, 43985), (625, 35188), (926, 23750), (950, 23150), (1250, 17594), (1852, 11875), (1900, 11575), (2315, 9500), (2375, 9260), (2500, 8797), (4630, 4750)]