21706475

素因数分解:

$5^2\times 7^1\times {\mathrm{71}}^1\times {\mathrm{1747}}^1$

素因数の和:1835

約数の個数: 24

約数和(自身を含む): 31212288

約数和(自身を除く): 9505813

約数列:

[1, 5, 7, 25, 35, 71, 175, 355, 497, 1747, 1775, 2485, 8735, 12229, 12425, 43675, 61145, 124037, 305725, 620185, 868259, 3100925, 4341295, 21706475]

約数ペア:

[(1, 21706475), (5, 4341295), (7, 3100925), (25, 868259), (35, 620185), (71, 305725), (175, 124037), (355, 61145), (497, 43675), (1747, 12425), (1775, 12229), (2485, 8735)]