20019760

素因数分解:

$2^4\times 5^1\times {\mathrm{251}}^1\times {\mathrm{997}}^1$

素因数の和:1261

約数の個数: 40

約数和(自身を含む): 46778256

約数和(自身を除く): 26758496

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 251, 502, 997, 1004, 1255, 1994, 2008, 2510, 3988, 4016, 4985, 5020, 7976, 9970, 10040, 15952, 19940, 20080, 39880, 79760, 250247, 500494, 1000988, 1251235, 2001976, 2502470, 4003952, 5004940, 10009880, 20019760]

約数ペア:

[(1, 20019760), (2, 10009880), (4, 5004940), (5, 4003952), (8, 2502470), (10, 2001976), (16, 1251235), (20, 1000988), (40, 500494), (80, 250247), (251, 79760), (502, 39880), (997, 20080), (1004, 19940), (1255, 15952), (1994, 10040), (2008, 9970), (2510, 7976), (3988, 5020), (4016, 4985)]