21915215

素因数分解:

$5^1\times 7^1\times {\mathrm{71}}^1\times {\mathrm{8819}}^1$

素因数の和:8902

約数の個数: 16

約数和(自身を含む): 30481920

約数和(自身を除く): 8566705

約数列:

[1, 5, 7, 35, 71, 355, 497, 2485, 8819, 44095, 61733, 308665, 626149, 3130745, 4383043, 21915215]

約数ペア:

[(1, 21915215), (5, 4383043), (7, 3130745), (35, 626149), (71, 308665), (355, 61733), (497, 44095), (2485, 8819)]