21606416

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{109}}^1\times {\mathrm{953}}^1$

素因数の和:1083

約数の個数: 40

約数和(自身を含む): 45543960

約数和(自身を除く): 23937544

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 104, 109, 208, 218, 436, 872, 953, 1417, 1744, 1906, 2834, 3812, 5668, 7624, 11336, 12389, 15248, 22672, 24778, 49556, 99112, 103877, 198224, 207754, 415508, 831016, 1350401, 1662032, 2700802, 5401604, 10803208, 21606416]

約数ペア:

[(1, 21606416), (2, 10803208), (4, 5401604), (8, 2700802), (13, 1662032), (16, 1350401), (26, 831016), (52, 415508), (104, 207754), (109, 198224), (208, 103877), (218, 99112), (436, 49556), (872, 24778), (953, 22672), (1417, 15248), (1744, 12389), (1906, 11336), (2834, 7624), (3812, 5668)]