777718180

素因数分解:

$2^2\times 5^1\times {\mathrm{101}}^1\times {\mathrm{131}}^1\times {\mathrm{2939}}^1$

素因数の和:3180

約数の個数: 48

約数和(自身を含む): 1662534720

約数和(自身を除く): 884816540

約数列:

[1, 2, 4, 5, 10, 20, 101, 131, 202, 262, 404, 505, 524, 655, 1010, 1310, 2020, 2620, 2939, 5878, 11756, 13231, 14695, 26462, 29390, 52924, 58780, 66155, 132310, 264620, 296839, 385009, 593678, 770018, 1187356, 1484195, 1540036, 1925045, 2968390, 3850090, 5936780, 7700180, 38885909, 77771818, 155543636, 194429545, 388859090, 777718180]

約数ペア:

[(1, 777718180), (2, 388859090), (4, 194429545), (5, 155543636), (10, 77771818), (20, 38885909), (101, 7700180), (131, 5936780), (202, 3850090), (262, 2968390), (404, 1925045), (505, 1540036), (524, 1484195), (655, 1187356), (1010, 770018), (1310, 593678), (2020, 385009), (2620, 296839), (2939, 264620), (5878, 132310), (11756, 66155), (13231, 58780), (14695, 52924), (26462, 29390)]