18710559

素因数分解:

$3^2\times 7^1\times {\mathrm{47}}^1\times {\mathrm{71}}^1\times {\mathrm{89}}^1$

素因数の和:220

約数の個数: 48

約数和(自身を含む): 32348160

約数和(自身を除く): 13637601

約数列:

[1, 3, 7, 9, 21, 47, 63, 71, 89, 141, 213, 267, 329, 423, 497, 623, 639, 801, 987, 1491, 1869, 2961, 3337, 4183, 4473, 5607, 6319, 10011, 12549, 18957, 23359, 29281, 30033, 37647, 44233, 56871, 70077, 87843, 132699, 210231, 263529, 296993, 398097, 890979, 2078951, 2672937, 6236853, 18710559]

約数ペア:

[(1, 18710559), (3, 6236853), (7, 2672937), (9, 2078951), (21, 890979), (47, 398097), (63, 296993), (71, 263529), (89, 210231), (141, 132699), (213, 87843), (267, 70077), (329, 56871), (423, 44233), (497, 37647), (623, 30033), (639, 29281), (801, 23359), (987, 18957), (1491, 12549), (1869, 10011), (2961, 6319), (3337, 5607), (4183, 4473)]