21373660

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{13879}}^1$

素因数の和:13906

約数の個数: 48

約数和(自身を含む): 55964160

約数和(自身を除く): 34590500

約数列:

[1, 2, 4, 5, 7, 10, 11, 14, 20, 22, 28, 35, 44, 55, 70, 77, 110, 140, 154, 220, 308, 385, 770, 1540, 13879, 27758, 55516, 69395, 97153, 138790, 152669, 194306, 277580, 305338, 388612, 485765, 610676, 763345, 971530, 1068683, 1526690, 1943060, 2137366, 3053380, 4274732, 5343415, 10686830, 21373660]

約数ペア:

[(1, 21373660), (2, 10686830), (4, 5343415), (5, 4274732), (7, 3053380), (10, 2137366), (11, 1943060), (14, 1526690), (20, 1068683), (22, 971530), (28, 763345), (35, 610676), (44, 485765), (55, 388612), (70, 305338), (77, 277580), (110, 194306), (140, 152669), (154, 138790), (220, 97153), (308, 69395), (385, 55516), (770, 27758), (1540, 13879)]