20744920

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{43}}^1\times {\mathrm{1723}}^1$

素因数の和:1784

約数の個数: 64

約数和(自身を含む): 54616320

約数和(自身を除く): 33871400

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 43, 56, 70, 86, 140, 172, 215, 280, 301, 344, 430, 602, 860, 1204, 1505, 1720, 1723, 2408, 3010, 3446, 6020, 6892, 8615, 12040, 12061, 13784, 17230, 24122, 34460, 48244, 60305, 68920, 74089, 96488, 120610, 148178, 241220, 296356, 370445, 482440, 518623, 592712, 740890, 1037246, 1481780, 2074492, 2593115, 2963560, 4148984, 5186230, 10372460, 20744920]

約数ペア:

[(1, 20744920), (2, 10372460), (4, 5186230), (5, 4148984), (7, 2963560), (8, 2593115), (10, 2074492), (14, 1481780), (20, 1037246), (28, 740890), (35, 592712), (40, 518623), (43, 482440), (56, 370445), (70, 296356), (86, 241220), (140, 148178), (172, 120610), (215, 96488), (280, 74089), (301, 68920), (344, 60305), (430, 48244), (602, 34460), (860, 24122), (1204, 17230), (1505, 13784), (1720, 12061), (1723, 12040), (2408, 8615), (3010, 6892), (3446, 6020)]