21721480

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{49367}}^1$

素因数の和:49389

約数の個数: 32

約数和(自身を含む): 53317440

約数和(自身を除く): 31595960

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 110, 220, 440, 49367, 98734, 197468, 246835, 394936, 493670, 543037, 987340, 1086074, 1974680, 2172148, 2715185, 4344296, 5430370, 10860740, 21721480]

約数ペア:

[(1, 21721480), (2, 10860740), (4, 5430370), (5, 4344296), (8, 2715185), (10, 2172148), (11, 1974680), (20, 1086074), (22, 987340), (40, 543037), (44, 493670), (55, 394936), (88, 246835), (110, 197468), (220, 98734), (440, 49367)]