20101520

素因数分解:

$2^4\times 5^1\times {\mathrm{71}}^1\times {\mathrm{3539}}^1$

素因数の和:3623

約数の個数: 40

約数和(自身を含む): 47407680

約数和(自身を除く): 27306160

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 71, 80, 142, 284, 355, 568, 710, 1136, 1420, 2840, 3539, 5680, 7078, 14156, 17695, 28312, 35390, 56624, 70780, 141560, 251269, 283120, 502538, 1005076, 1256345, 2010152, 2512690, 4020304, 5025380, 10050760, 20101520]

約数ペア:

[(1, 20101520), (2, 10050760), (4, 5025380), (5, 4020304), (8, 2512690), (10, 2010152), (16, 1256345), (20, 1005076), (40, 502538), (71, 283120), (80, 251269), (142, 141560), (284, 70780), (355, 56624), (568, 35390), (710, 28312), (1136, 17695), (1420, 14156), (2840, 7078), (3539, 5680)]