21000833240

素因数分解:

$2^3\times 5^1\times {\mathrm{7639}}^1\times {\mathrm{68729}}^1$

素因数の和:76379

約数の個数: 32

約数和(自身を含む): 47258748000

約数和(自身を除く): 26257914760

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 7639, 15278, 30556, 38195, 61112, 68729, 76390, 137458, 152780, 274916, 305560, 343645, 549832, 687290, 1374580, 2749160, 525020831, 1050041662, 2100083324, 2625104155, 4200166648, 5250208310, 10500416620, 21000833240]

約数ペア:

[(1, 21000833240), (2, 10500416620), (4, 5250208310), (5, 4200166648), (8, 2625104155), (10, 2100083324), (20, 1050041662), (40, 525020831), (7639, 2749160), (15278, 1374580), (30556, 687290), (38195, 549832), (61112, 343645), (68729, 305560), (76390, 274916), (137458, 152780)]