21685545

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{43}}^1\times {\mathrm{1601}}^1$

素因数の和:1662

約数の個数: 48

約数和(自身を含む): 43984512

約数和(自身を除く): 22298967

約数列:

[1, 3, 5, 7, 9, 15, 21, 35, 43, 45, 63, 105, 129, 215, 301, 315, 387, 645, 903, 1505, 1601, 1935, 2709, 4515, 4803, 8005, 11207, 13545, 14409, 24015, 33621, 56035, 68843, 72045, 100863, 168105, 206529, 344215, 481901, 504315, 619587, 1032645, 1445703, 2409505, 3097935, 4337109, 7228515, 21685545]

約数ペア:

[(1, 21685545), (3, 7228515), (5, 4337109), (7, 3097935), (9, 2409505), (15, 1445703), (21, 1032645), (35, 619587), (43, 504315), (45, 481901), (63, 344215), (105, 206529), (129, 168105), (215, 100863), (301, 72045), (315, 68843), (387, 56035), (645, 33621), (903, 24015), (1505, 14409), (1601, 13545), (1935, 11207), (2709, 8005), (4515, 4803)]