21628005

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{205981}}^1$

素因数の和:205996

約数の個数: 16

約数和(自身を含む): 39548544

約数和(自身を除く): 17920539

約数列:

[1, 3, 5, 7, 15, 21, 35, 105, 205981, 617943, 1029905, 1441867, 3089715, 4325601, 7209335, 21628005]

約数ペア:

[(1, 21628005), (3, 7209335), (5, 4325601), (7, 3089715), (15, 1441867), (21, 1029905), (35, 617943), (105, 205981)]