20079760

素因数分解:

$2^4\times 5^1\times {\mathrm{499}}^1\times {\mathrm{503}}^1$

素因数の和:1015

約数の個数: 40

約数和(自身を含む): 46872000

約数和(自身を除く): 26792240

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 499, 503, 998, 1006, 1996, 2012, 2495, 2515, 3992, 4024, 4990, 5030, 7984, 8048, 9980, 10060, 19960, 20120, 39920, 40240, 250997, 501994, 1003988, 1254985, 2007976, 2509970, 4015952, 5019940, 10039880, 20079760]

約数ペア:

[(1, 20079760), (2, 10039880), (4, 5019940), (5, 4015952), (8, 2509970), (10, 2007976), (16, 1254985), (20, 1003988), (40, 501994), (80, 250997), (499, 40240), (503, 39920), (998, 20120), (1006, 19960), (1996, 10060), (2012, 9980), (2495, 8048), (2515, 7984), (3992, 5030), (4024, 4990)]