21001715

素因数分解:

$5^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{47}}^1\times {\mathrm{751}}^1$

素因数の和:827

約数の個数: 32

約数和(自身を含む): 31186944

約数和(自身を除く): 10185229

約数列:

[1, 5, 7, 17, 35, 47, 85, 119, 235, 329, 595, 751, 799, 1645, 3755, 3995, 5257, 5593, 12767, 26285, 27965, 35297, 63835, 89369, 176485, 247079, 446845, 600049, 1235395, 3000245, 4200343, 21001715]

約数ペア:

[(1, 21001715), (5, 4200343), (7, 3000245), (17, 1235395), (35, 600049), (47, 446845), (85, 247079), (119, 176485), (235, 89369), (329, 63835), (595, 35297), (751, 27965), (799, 26285), (1645, 12767), (3755, 5593), (3995, 5257)]