20377600

素因数分解:

$2^{12}\times 5^2\times {\mathrm{199}}^1$

素因数の和:233

約数の個数: 78

約数和(自身を含む): 50784200

約数和(自身を除く): 30406600

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 64, 80, 100, 128, 160, 199, 200, 256, 320, 398, 400, 512, 640, 796, 800, 995, 1024, 1280, 1592, 1600, 1990, 2048, 2560, 3184, 3200, 3980, 4096, 4975, 5120, 6368, 6400, 7960, 9950, 10240, 12736, 12800, 15920, 19900, 20480, 25472, 25600, 31840, 39800, 50944, 51200, 63680, 79600, 101888, 102400, 127360, 159200, 203776, 254720, 318400, 407552, 509440, 636800, 815104, 1018880, 1273600, 2037760, 2547200, 4075520, 5094400, 10188800, 20377600]

約数ペア:

[(1, 20377600), (2, 10188800), (4, 5094400), (5, 4075520), (8, 2547200), (10, 2037760), (16, 1273600), (20, 1018880), (25, 815104), (32, 636800), (40, 509440), (50, 407552), (64, 318400), (80, 254720), (100, 203776), (128, 159200), (160, 127360), (199, 102400), (200, 101888), (256, 79600), (320, 63680), (398, 51200), (400, 50944), (512, 39800), (640, 31840), (796, 25600), (800, 25472), (995, 20480), (1024, 19900), (1280, 15920), (1592, 12800), (1600, 12736), (1990, 10240), (2048, 9950), (2560, 7960), (3184, 6400), (3200, 6368), (3980, 5120), (4096, 4975)]