20161488380

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{641}}^1\times {\mathrm{142969}}^1$

素因数の和:143630

約数の個数: 48

約数和(自身を含む): 46260516960

約数和(自身を除く): 26099028580

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 220, 641, 1282, 2564, 3205, 6410, 7051, 12820, 14102, 28204, 35255, 70510, 141020, 142969, 285938, 571876, 714845, 1429690, 1572659, 2859380, 3145318, 6290636, 7863295, 15726590, 31453180, 91643129, 183286258, 366572516, 458215645, 916431290, 1008074419, 1832862580, 2016148838, 4032297676, 5040372095, 10080744190, 20161488380]

約数ペア:

[(1, 20161488380), (2, 10080744190), (4, 5040372095), (5, 4032297676), (10, 2016148838), (11, 1832862580), (20, 1008074419), (22, 916431290), (44, 458215645), (55, 366572516), (110, 183286258), (220, 91643129), (641, 31453180), (1282, 15726590), (2564, 7863295), (3205, 6290636), (6410, 3145318), (7051, 2859380), (12820, 1572659), (14102, 1429690), (28204, 714845), (35255, 571876), (70510, 285938), (141020, 142969)]