640286480

素因数分解:

$2^4\times 5^1\times {\mathrm{37}}^1\times {\mathrm{199}}^1\times {\mathrm{1087}}^1$

素因数の和:1336

約数の個数: 80

約数和(自身を含む): 1537996800

約数和(自身を除く): 897710320

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 37, 40, 74, 80, 148, 185, 199, 296, 370, 398, 592, 740, 796, 995, 1087, 1480, 1592, 1990, 2174, 2960, 3184, 3980, 4348, 5435, 7363, 7960, 8696, 10870, 14726, 15920, 17392, 21740, 29452, 36815, 40219, 43480, 58904, 73630, 80438, 86960, 117808, 147260, 160876, 201095, 216313, 294520, 321752, 402190, 432626, 589040, 643504, 804380, 865252, 1081565, 1608760, 1730504, 2163130, 3217520, 3461008, 4326260, 8003581, 8652520, 16007162, 17305040, 32014324, 40017905, 64028648, 80035810, 128057296, 160071620, 320143240, 640286480]

約数ペア:

[(1, 640286480), (2, 320143240), (4, 160071620), (5, 128057296), (8, 80035810), (10, 64028648), (16, 40017905), (20, 32014324), (37, 17305040), (40, 16007162), (74, 8652520), (80, 8003581), (148, 4326260), (185, 3461008), (199, 3217520), (296, 2163130), (370, 1730504), (398, 1608760), (592, 1081565), (740, 865252), (796, 804380), (995, 643504), (1087, 589040), (1480, 432626), (1592, 402190), (1990, 321752), (2174, 294520), (2960, 216313), (3184, 201095), (3980, 160876), (4348, 147260), (5435, 117808), (7363, 86960), (7960, 80438), (8696, 73630), (10870, 58904), (14726, 43480), (15920, 40219), (17392, 36815), (21740, 29452)]