20759540

素因数分解:

$2^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{101}}^1\times {\mathrm{239}}^1$

素因数の和:392

約数の個数: 48

約数和(自身を含む): 45239040

約数和(自身を除く): 24479500

約数列:

[1, 2, 4, 5, 10, 20, 43, 86, 101, 172, 202, 215, 239, 404, 430, 478, 505, 860, 956, 1010, 1195, 2020, 2390, 4343, 4780, 8686, 10277, 17372, 20554, 21715, 24139, 41108, 43430, 48278, 51385, 86860, 96556, 102770, 120695, 205540, 241390, 482780, 1037977, 2075954, 4151908, 5189885, 10379770, 20759540]

約数ペア:

[(1, 20759540), (2, 10379770), (4, 5189885), (5, 4151908), (10, 2075954), (20, 1037977), (43, 482780), (86, 241390), (101, 205540), (172, 120695), (202, 102770), (215, 96556), (239, 86860), (404, 51385), (430, 48278), (478, 43430), (505, 41108), (860, 24139), (956, 21715), (1010, 20554), (1195, 17372), (2020, 10277), (2390, 8686), (4343, 4780)]