20447560

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{103}}^1\times {\mathrm{709}}^1$

素因数の和:830

約数の個数: 64

約数和(自身を含む): 53164800

約数和(自身を除く): 32717240

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 103, 140, 206, 280, 412, 515, 709, 721, 824, 1030, 1418, 1442, 2060, 2836, 2884, 3545, 3605, 4120, 4963, 5672, 5768, 7090, 7210, 9926, 14180, 14420, 19852, 24815, 28360, 28840, 39704, 49630, 73027, 99260, 146054, 198520, 292108, 365135, 511189, 584216, 730270, 1022378, 1460540, 2044756, 2555945, 2921080, 4089512, 5111890, 10223780, 20447560]

約数ペア:

[(1, 20447560), (2, 10223780), (4, 5111890), (5, 4089512), (7, 2921080), (8, 2555945), (10, 2044756), (14, 1460540), (20, 1022378), (28, 730270), (35, 584216), (40, 511189), (56, 365135), (70, 292108), (103, 198520), (140, 146054), (206, 99260), (280, 73027), (412, 49630), (515, 39704), (709, 28840), (721, 28360), (824, 24815), (1030, 19852), (1418, 14420), (1442, 14180), (2060, 9926), (2836, 7210), (2884, 7090), (3545, 5768), (3605, 5672), (4120, 4963)]