2561209600

素因数分解:

$2^8\times 5^2\times {\mathrm{199}}^1\times {\mathrm{2011}}^1$

素因数の和:2236

約数の個数: 108

約数和(自身を含む): 6374418400

約数和(自身を除く): 3813208800

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, 640, 796, 800, 995, 1280, 1592, 1600, 1990, 2011, 3184, 3200, 3980, 4022, 4975, 6368, 6400, 7960, 8044, 9950, 10055, 12736, 15920, 16088, 19900, 20110, 25472, 31840, 32176, 39800, 40220, 50275, 50944, 63680, 64352, 79600, 80440, 100550, 127360, 128704, 159200, 160880, 201100, 254720, 257408, 318400, 321760, 400189, 402200, 514816, 636800, 643520, 800378, 804400, 1273600, 1287040, 1600756, 1608800, 2000945, 2574080, 3201512, 3217600, 4001890, 6403024, 6435200, 8003780, 10004725, 12806048, 12870400, 16007560, 20009450, 25612096, 32015120, 40018900, 51224192, 64030240, 80037800, 102448384, 128060480, 160075600, 256120960, 320151200, 512241920, 640302400, 1280604800, 2561209600]

約数ペア:

[(1, 2561209600), (2, 1280604800), (4, 640302400), (5, 512241920), (8, 320151200), (10, 256120960), (16, 160075600), (20, 128060480), (25, 102448384), (32, 80037800), (40, 64030240), (50, 51224192), (64, 40018900), (80, 32015120), (100, 25612096), (128, 20009450), (160, 16007560), (199, 12870400), (200, 12806048), (256, 10004725), (320, 8003780), (398, 6435200), (400, 6403024), (640, 4001890), (796, 3217600), (800, 3201512), (995, 2574080), (1280, 2000945), (1592, 1608800), (1600, 1600756), (1990, 1287040), (2011, 1273600), (3184, 804400), (3200, 800378), (3980, 643520), (4022, 636800), (4975, 514816), (6368, 402200), (6400, 400189), (7960, 321760), (8044, 318400), (9950, 257408), (10055, 254720), (12736, 201100), (15920, 160880), (16088, 159200), (19900, 128704), (20110, 127360), (25472, 100550), (31840, 80440), (32176, 79600), (39800, 64352), (40220, 63680), (50275, 50944)]