21989765

素因数分解:

$5^1\times 7^1\times {\mathrm{71}}^1\times {\mathrm{8849}}^1$

素因数の和:8932

約数の個数: 16

約数和(自身を含む): 30585600

約数和(自身を除く): 8595835

約数列:

[1, 5, 7, 35, 71, 355, 497, 2485, 8849, 44245, 61943, 309715, 628279, 3141395, 4397953, 21989765]

約数ペア:

[(1, 21989765), (5, 4397953), (7, 3141395), (35, 628279), (71, 309715), (355, 61943), (497, 44245), (2485, 8849)]