20501120

素因数分解:

$2^7\times 5^1\times {\mathrm{103}}^1\times {\mathrm{311}}^1$

素因数の和:433

約数の個数: 64

約数和(自身を含む): 49645440

約数和(自身を除く): 29144320

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 103, 128, 160, 206, 311, 320, 412, 515, 622, 640, 824, 1030, 1244, 1555, 1648, 2060, 2488, 3110, 3296, 4120, 4976, 6220, 6592, 8240, 9952, 12440, 13184, 16480, 19904, 24880, 32033, 32960, 39808, 49760, 64066, 65920, 99520, 128132, 160165, 199040, 256264, 320330, 512528, 640660, 1025056, 1281320, 2050112, 2562640, 4100224, 5125280, 10250560, 20501120]

約数ペア:

[(1, 20501120), (2, 10250560), (4, 5125280), (5, 4100224), (8, 2562640), (10, 2050112), (16, 1281320), (20, 1025056), (32, 640660), (40, 512528), (64, 320330), (80, 256264), (103, 199040), (128, 160165), (160, 128132), (206, 99520), (311, 65920), (320, 64066), (412, 49760), (515, 39808), (622, 32960), (640, 32033), (824, 24880), (1030, 19904), (1244, 16480), (1555, 13184), (1648, 12440), (2060, 9952), (2488, 8240), (3110, 6592), (3296, 6220), (4120, 4976)]