81187840

素因数分解:

$2^{10}\times 5^1\times {\mathrm{101}}^1\times {\mathrm{157}}^1$

素因数の和:283

約数の個数: 88

約数和(自身を含む): 197936712

約数和(自身を除く): 116748872

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 101, 128, 157, 160, 202, 256, 314, 320, 404, 505, 512, 628, 640, 785, 808, 1010, 1024, 1256, 1280, 1570, 1616, 2020, 2512, 2560, 3140, 3232, 4040, 5024, 5120, 6280, 6464, 8080, 10048, 12560, 12928, 15857, 16160, 20096, 25120, 25856, 31714, 32320, 40192, 50240, 51712, 63428, 64640, 79285, 80384, 100480, 103424, 126856, 129280, 158570, 160768, 200960, 253712, 258560, 317140, 401920, 507424, 517120, 634280, 803840, 1014848, 1268560, 2029696, 2537120, 4059392, 5074240, 8118784, 10148480, 16237568, 20296960, 40593920, 81187840]

約数ペア:

[(1, 81187840), (2, 40593920), (4, 20296960), (5, 16237568), (8, 10148480), (10, 8118784), (16, 5074240), (20, 4059392), (32, 2537120), (40, 2029696), (64, 1268560), (80, 1014848), (101, 803840), (128, 634280), (157, 517120), (160, 507424), (202, 401920), (256, 317140), (314, 258560), (320, 253712), (404, 200960), (505, 160768), (512, 158570), (628, 129280), (640, 126856), (785, 103424), (808, 100480), (1010, 80384), (1024, 79285), (1256, 64640), (1280, 63428), (1570, 51712), (1616, 50240), (2020, 40192), (2512, 32320), (2560, 31714), (3140, 25856), (3232, 25120), (4040, 20096), (5024, 16160), (5120, 15857), (6280, 12928), (6464, 12560), (8080, 10048)]