21139216

素因数分解:

$2^4\times 7^1\times {\mathrm{173}}^1\times {\mathrm{1091}}^1$

素因数の和:1279

約数の個数: 40

約数和(自身を含む): 47121984

約数和(自身を除く): 25982768

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 56, 112, 173, 346, 692, 1091, 1211, 1384, 2182, 2422, 2768, 4364, 4844, 7637, 8728, 9688, 15274, 17456, 19376, 30548, 61096, 122192, 188743, 377486, 754972, 1321201, 1509944, 2642402, 3019888, 5284804, 10569608, 21139216]

約数ペア:

[(1, 21139216), (2, 10569608), (4, 5284804), (7, 3019888), (8, 2642402), (14, 1509944), (16, 1321201), (28, 754972), (56, 377486), (112, 188743), (173, 122192), (346, 61096), (692, 30548), (1091, 19376), (1211, 17456), (1384, 15274), (2182, 9688), (2422, 8728), (2768, 7637), (4364, 4844)]