28405790

素因数分解:

$2^1\times 5^1\times 7^2\times {\mathrm{29}}^1\times {\mathrm{1999}}^1$

素因数の和:2049

約数の個数: 48

約数和(自身を含む): 61560000

約数和(自身を除く): 33154210

約数列:

[1, 2, 5, 7, 10, 14, 29, 35, 49, 58, 70, 98, 145, 203, 245, 290, 406, 490, 1015, 1421, 1999, 2030, 2842, 3998, 7105, 9995, 13993, 14210, 19990, 27986, 57971, 69965, 97951, 115942, 139930, 195902, 289855, 405797, 489755, 579710, 811594, 979510, 2028985, 2840579, 4057970, 5681158, 14202895, 28405790]

約数ペア:

[(1, 28405790), (2, 14202895), (5, 5681158), (7, 4057970), (10, 2840579), (14, 2028985), (29, 979510), (35, 811594), (49, 579710), (58, 489755), (70, 405797), (98, 289855), (145, 195902), (203, 139930), (245, 115942), (290, 97951), (406, 69965), (490, 57971), (1015, 27986), (1421, 19990), (1999, 14210), (2030, 13993), (2842, 9995), (3998, 7105)]