21950005

素因数分解:

$5^1\times 7^1\times {\mathrm{11}}^2\times {\mathrm{71}}^1\times {\mathrm{73}}^1$

素因数の和:178

約数の個数: 48

約数和(自身を含む): 34013952

約数和(自身を除く): 12063947

約数列:

[1, 5, 7, 11, 35, 55, 71, 73, 77, 121, 355, 365, 385, 497, 511, 605, 781, 803, 847, 2485, 2555, 3905, 4015, 4235, 5183, 5467, 5621, 8591, 8833, 25915, 27335, 28105, 36281, 42955, 44165, 57013, 60137, 61831, 181405, 285065, 300685, 309155, 399091, 627143, 1995455, 3135715, 4390001, 21950005]

約数ペア:

[(1, 21950005), (5, 4390001), (7, 3135715), (11, 1995455), (35, 627143), (55, 399091), (71, 309155), (73, 300685), (77, 285065), (121, 181405), (355, 61831), (365, 60137), (385, 57013), (497, 44165), (511, 42955), (605, 36281), (781, 28105), (803, 27335), (847, 25915), (2485, 8833), (2555, 8591), (3905, 5621), (4015, 5467), (4235, 5183)]