28401280

素因数分解:

$2^7\times 5^1\times {\mathrm{199}}^1\times {\mathrm{223}}^1$

素因数の和:441

約数の個数: 64

約数和(自身を含む): 68544000

約数和(自身を除く): 40142720

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 199, 223, 320, 398, 446, 640, 796, 892, 995, 1115, 1592, 1784, 1990, 2230, 3184, 3568, 3980, 4460, 6368, 7136, 7960, 8920, 12736, 14272, 15920, 17840, 25472, 28544, 31840, 35680, 44377, 63680, 71360, 88754, 127360, 142720, 177508, 221885, 355016, 443770, 710032, 887540, 1420064, 1775080, 2840128, 3550160, 5680256, 7100320, 14200640, 28401280]

約数ペア:

[(1, 28401280), (2, 14200640), (4, 7100320), (5, 5680256), (8, 3550160), (10, 2840128), (16, 1775080), (20, 1420064), (32, 887540), (40, 710032), (64, 443770), (80, 355016), (128, 221885), (160, 177508), (199, 142720), (223, 127360), (320, 88754), (398, 71360), (446, 63680), (640, 44377), (796, 35680), (892, 31840), (995, 28544), (1115, 25472), (1592, 17840), (1784, 15920), (1990, 14272), (2230, 12736), (3184, 8920), (3568, 7960), (3980, 7136), (4460, 6368)]