21109970

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{29}}^1\times {\mathrm{10399}}^1$

素因数の和:10442

約数の個数: 32

約数和(自身を含む): 44928000

約数和(自身を除く): 23818030

約数列:

[1, 2, 5, 7, 10, 14, 29, 35, 58, 70, 145, 203, 290, 406, 1015, 2030, 10399, 20798, 51995, 72793, 103990, 145586, 301571, 363965, 603142, 727930, 1507855, 2110997, 3015710, 4221994, 10554985, 21109970]

約数ペア:

[(1, 21109970), (2, 10554985), (5, 4221994), (7, 3015710), (10, 2110997), (14, 1507855), (29, 727930), (35, 603142), (58, 363965), (70, 301571), (145, 145586), (203, 103990), (290, 72793), (406, 51995), (1015, 20798), (2030, 10399)]