21857840

素因数分解:

$2^4\times 5^1\times {\mathrm{433}}^1\times {\mathrm{631}}^1$

素因数の和:1077

約数の個数: 40

約数和(自身を含む): 51017568

約数和(自身を除く): 29159728

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 433, 631, 866, 1262, 1732, 2165, 2524, 3155, 3464, 4330, 5048, 6310, 6928, 8660, 10096, 12620, 17320, 25240, 34640, 50480, 273223, 546446, 1092892, 1366115, 2185784, 2732230, 4371568, 5464460, 10928920, 21857840]

約数ペア:

[(1, 21857840), (2, 10928920), (4, 5464460), (5, 4371568), (8, 2732230), (10, 2185784), (16, 1366115), (20, 1092892), (40, 546446), (80, 273223), (433, 50480), (631, 34640), (866, 25240), (1262, 17320), (1732, 12620), (2165, 10096), (2524, 8660), (3155, 6928), (3464, 6310), (4330, 5048)]