20407040

素因数分解:

$2^8\times 5^1\times {\mathrm{107}}^1\times {\mathrm{149}}^1$

素因数の和:277

約数の個数: 72

約数和(自身を含む): 49669200

約数和(自身を除く): 29262160

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 107, 128, 149, 160, 214, 256, 298, 320, 428, 535, 596, 640, 745, 856, 1070, 1192, 1280, 1490, 1712, 2140, 2384, 2980, 3424, 4280, 4768, 5960, 6848, 8560, 9536, 11920, 13696, 15943, 17120, 19072, 23840, 27392, 31886, 34240, 38144, 47680, 63772, 68480, 79715, 95360, 127544, 136960, 159430, 190720, 255088, 318860, 510176, 637720, 1020352, 1275440, 2040704, 2550880, 4081408, 5101760, 10203520, 20407040]

約数ペア:

[(1, 20407040), (2, 10203520), (4, 5101760), (5, 4081408), (8, 2550880), (10, 2040704), (16, 1275440), (20, 1020352), (32, 637720), (40, 510176), (64, 318860), (80, 255088), (107, 190720), (128, 159430), (149, 136960), (160, 127544), (214, 95360), (256, 79715), (298, 68480), (320, 63772), (428, 47680), (535, 38144), (596, 34240), (640, 31886), (745, 27392), (856, 23840), (1070, 19072), (1192, 17120), (1280, 15943), (1490, 13696), (1712, 11920), (2140, 9536), (2384, 8560), (2980, 6848), (3424, 5960), (4280, 4768)]