21159415

素因数分解:

$5^1\times {\mathrm{29}}^1\times {\mathrm{73}}^1\times {\mathrm{1999}}^1$

素因数の和:2106

約数の個数: 16

約数和(自身を含む): 26640000

約数和(自身を除く): 5480585

約数列:

[1, 5, 29, 73, 145, 365, 1999, 2117, 9995, 10585, 57971, 145927, 289855, 729635, 4231883, 21159415]

約数ペア:

[(1, 21159415), (5, 4231883), (29, 729635), (73, 289855), (145, 145927), (365, 57971), (1999, 10585), (2117, 9995)]