19636720

素因数分解:

$2^4\times 5^1\times {\mathrm{389}}^1\times {\mathrm{631}}^1$

素因数の和:1033

約数の個数: 40

約数和(自身を含む): 45845280

約数和(自身を除く): 26208560

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 389, 631, 778, 1262, 1556, 1945, 2524, 3112, 3155, 3890, 5048, 6224, 6310, 7780, 10096, 12620, 15560, 25240, 31120, 50480, 245459, 490918, 981836, 1227295, 1963672, 2454590, 3927344, 4909180, 9818360, 19636720]

約数ペア:

[(1, 19636720), (2, 9818360), (4, 4909180), (5, 3927344), (8, 2454590), (10, 1963672), (16, 1227295), (20, 981836), (40, 490918), (80, 245459), (389, 50480), (631, 31120), (778, 25240), (1262, 15560), (1556, 12620), (1945, 10096), (2524, 7780), (3112, 6310), (3155, 6224), (3890, 5048)]