20289850

素因数分解:

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

素因数の和:2047

約数の個数: 48

約数和(自身を含む): 44640000

約数和(自身を除く): 24350150

約数列:

[1, 2, 5, 7, 10, 14, 25, 29, 35, 50, 58, 70, 145, 175, 203, 290, 350, 406, 725, 1015, 1450, 1999, 2030, 3998, 5075, 9995, 10150, 13993, 19990, 27986, 49975, 57971, 69965, 99950, 115942, 139930, 289855, 349825, 405797, 579710, 699650, 811594, 1449275, 2028985, 2898550, 4057970, 10144925, 20289850]

約数ペア:

[(1, 20289850), (2, 10144925), (5, 4057970), (7, 2898550), (10, 2028985), (14, 1449275), (25, 811594), (29, 699650), (35, 579710), (50, 405797), (58, 349825), (70, 289855), (145, 139930), (175, 115942), (203, 99950), (290, 69965), (350, 57971), (406, 49975), (725, 27986), (1015, 19990), (1450, 13993), (1999, 10150), (2030, 9995), (3998, 5075)]