28780155

素因数分解:

$3^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{41}}^1\times {\mathrm{821}}^1$

素因数の和:892

約数の個数: 48

約数和(自身を含む): 53857440

約数和(自身を除く): 25077285

約数列:

[1, 3, 5, 9, 15, 19, 41, 45, 57, 95, 123, 171, 205, 285, 369, 615, 779, 821, 855, 1845, 2337, 2463, 3895, 4105, 7011, 7389, 11685, 12315, 15599, 33661, 35055, 36945, 46797, 77995, 100983, 140391, 168305, 233985, 302949, 504915, 639559, 701955, 1514745, 1918677, 3197795, 5756031, 9593385, 28780155]

約数ペア:

[(1, 28780155), (3, 9593385), (5, 5756031), (9, 3197795), (15, 1918677), (19, 1514745), (41, 701955), (45, 639559), (57, 504915), (95, 302949), (123, 233985), (171, 168305), (205, 140391), (285, 100983), (369, 77995), (615, 46797), (779, 36945), (821, 35055), (855, 33661), (1845, 15599), (2337, 12315), (2463, 11685), (3895, 7389), (4105, 7011)]