20059640

素因数分解:

$2^3\times 5^1\times {\mathrm{503}}^1\times {\mathrm{997}}^1$

素因数の和:1511

約数の個数: 32

約数和(自身を含む): 45269280

約数和(自身を除く): 25209640

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 503, 997, 1006, 1994, 2012, 2515, 3988, 4024, 4985, 5030, 7976, 9970, 10060, 19940, 20120, 39880, 501491, 1002982, 2005964, 2507455, 4011928, 5014910, 10029820, 20059640]

約数ペア:

[(1, 20059640), (2, 10029820), (4, 5014910), (5, 4011928), (8, 2507455), (10, 2005964), (20, 1002982), (40, 501491), (503, 39880), (997, 20120), (1006, 19940), (1994, 10060), (2012, 9970), (2515, 7976), (3988, 5030), (4024, 4985)]