642837760

素因数分解:

$2^8\times 5^1\times {\mathrm{502217}}^1$

素因数の和:502238

約数の個数: 36

約数和(自身を含む): 1539800388

約数和(自身を除く): 896962628

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 256, 320, 640, 1280, 502217, 1004434, 2008868, 2511085, 4017736, 5022170, 8035472, 10044340, 16070944, 20088680, 32141888, 40177360, 64283776, 80354720, 128567552, 160709440, 321418880, 642837760]

約数ペア:

[(1, 642837760), (2, 321418880), (4, 160709440), (5, 128567552), (8, 80354720), (10, 64283776), (16, 40177360), (20, 32141888), (32, 20088680), (40, 16070944), (64, 10044340), (80, 8035472), (128, 5022170), (160, 4017736), (256, 2511085), (320, 2008868), (640, 1004434), (1280, 502217)]