21868385

素因数分解:

$5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{79}}^1\times {\mathrm{719}}^1$

素因数の和:821

約数の個数: 32

約数和(自身を含む): 33177600

約数和(自身を除く): 11309215

約数列:

[1, 5, 7, 11, 35, 55, 77, 79, 385, 395, 553, 719, 869, 2765, 3595, 4345, 5033, 6083, 7909, 25165, 30415, 39545, 55363, 56801, 276815, 284005, 397607, 624811, 1988035, 3124055, 4373677, 21868385]

約数ペア:

[(1, 21868385), (5, 4373677), (7, 3124055), (11, 1988035), (35, 624811), (55, 397607), (77, 284005), (79, 276815), (385, 56801), (395, 55363), (553, 39545), (719, 30415), (869, 25165), (2765, 7909), (3595, 6083), (4345, 5033)]