39880000

素因数分解:

$2^6\times 5^4\times {\mathrm{997}}^1$

素因数の和:1029

約数の個数: 70

約数和(自身を含む): 98988626

約数和(自身を除く): 59108626

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 64, 80, 100, 125, 160, 200, 250, 320, 400, 500, 625, 800, 997, 1000, 1250, 1600, 1994, 2000, 2500, 3988, 4000, 4985, 5000, 7976, 8000, 9970, 10000, 15952, 19940, 20000, 24925, 31904, 39880, 40000, 49850, 63808, 79760, 99700, 124625, 159520, 199400, 249250, 319040, 398800, 498500, 623125, 797600, 997000, 1246250, 1595200, 1994000, 2492500, 3988000, 4985000, 7976000, 9970000, 19940000, 39880000]

約数ペア:

[(1, 39880000), (2, 19940000), (4, 9970000), (5, 7976000), (8, 4985000), (10, 3988000), (16, 2492500), (20, 1994000), (25, 1595200), (32, 1246250), (40, 997000), (50, 797600), (64, 623125), (80, 498500), (100, 398800), (125, 319040), (160, 249250), (200, 199400), (250, 159520), (320, 124625), (400, 99700), (500, 79760), (625, 63808), (800, 49850), (997, 40000), (1000, 39880), (1250, 31904), (1600, 24925), (1994, 20000), (2000, 19940), (2500, 15952), (3988, 10000), (4000, 9970), (4985, 8000), (5000, 7976)]