398132480

素因数分解:

$2^8\times 5^1\times {\mathrm{311041}}^1$

素因数の和:311062

約数の個数: 36

約数和(自身を含む): 953654772

約数和(自身を除く): 555522292

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 256, 320, 640, 1280, 311041, 622082, 1244164, 1555205, 2488328, 3110410, 4976656, 6220820, 9953312, 12441640, 19906624, 24883280, 39813248, 49766560, 79626496, 99533120, 199066240, 398132480]

約数ペア:

[(1, 398132480), (2, 199066240), (4, 99533120), (5, 79626496), (8, 49766560), (10, 39813248), (16, 24883280), (20, 19906624), (32, 12441640), (40, 9953312), (64, 6220820), (80, 4976656), (128, 3110410), (160, 2488328), (256, 1555205), (320, 1244164), (640, 622082), (1280, 311041)]