20658520

素因数分解:

$2^3\times 5^1\times {\mathrm{241}}^1\times {\mathrm{2143}}^1$

素因数の和:2395

約数の個数: 32

約数和(自身を含む): 46696320

約数和(自身を除く): 26037800

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 241, 482, 964, 1205, 1928, 2143, 2410, 4286, 4820, 8572, 9640, 10715, 17144, 21430, 42860, 85720, 516463, 1032926, 2065852, 2582315, 4131704, 5164630, 10329260, 20658520]

約数ペア:

[(1, 20658520), (2, 10329260), (4, 5164630), (5, 4131704), (8, 2582315), (10, 2065852), (20, 1032926), (40, 516463), (241, 85720), (482, 42860), (964, 21430), (1205, 17144), (1928, 10715), (2143, 9640), (2410, 8572), (4286, 4820)]