21985810

素因数分解:

$2^1\times 5^1\times 7^2\times {\mathrm{11}}^1\times {\mathrm{4079}}^1$

素因数の和:4111

約数の個数: 48

約数和(自身を含む): 50232960

約数和(自身を除く): 28247150

約数列:

[1, 2, 5, 7, 10, 11, 14, 22, 35, 49, 55, 70, 77, 98, 110, 154, 245, 385, 490, 539, 770, 1078, 2695, 4079, 5390, 8158, 20395, 28553, 40790, 44869, 57106, 89738, 142765, 199871, 224345, 285530, 314083, 399742, 448690, 628166, 999355, 1570415, 1998710, 2198581, 3140830, 4397162, 10992905, 21985810]

約数ペア:

[(1, 21985810), (2, 10992905), (5, 4397162), (7, 3140830), (10, 2198581), (11, 1998710), (14, 1570415), (22, 999355), (35, 628166), (49, 448690), (55, 399742), (70, 314083), (77, 285530), (98, 224345), (110, 199871), (154, 142765), (245, 89738), (385, 57106), (490, 44869), (539, 40790), (770, 28553), (1078, 20395), (2695, 8158), (4079, 5390)]