20049880

素因数分解:

$2^3\times 5^1\times {\mathrm{251}}^1\times {\mathrm{1997}}^1$

素因数の和:2259

約数の個数: 32

約数和(自身を含む): 45314640

約数和(自身を除く): 25264760

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 251, 502, 1004, 1255, 1997, 2008, 2510, 3994, 5020, 7988, 9985, 10040, 15976, 19970, 39940, 79880, 501247, 1002494, 2004988, 2506235, 4009976, 5012470, 10024940, 20049880]

約数ペア:

[(1, 20049880), (2, 10024940), (4, 5012470), (5, 4009976), (8, 2506235), (10, 2004988), (20, 1002494), (40, 501247), (251, 79880), (502, 39940), (1004, 19970), (1255, 15976), (1997, 10040), (2008, 9985), (2510, 7988), (3994, 5020)]