19978785

素因数分解:

$3^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{7789}}^1$

素因数の和:7822

約数の個数: 32

約数和(自身を含む): 37392000

約数和(自身を除く): 17413215

約数列:

[1, 3, 5, 9, 15, 19, 27, 45, 57, 95, 135, 171, 285, 513, 855, 2565, 7789, 23367, 38945, 70101, 116835, 147991, 210303, 350505, 443973, 739955, 1051515, 1331919, 2219865, 3995757, 6659595, 19978785]

約数ペア:

[(1, 19978785), (3, 6659595), (5, 3995757), (9, 2219865), (15, 1331919), (19, 1051515), (27, 739955), (45, 443973), (57, 350505), (95, 210303), (135, 147991), (171, 116835), (285, 70101), (513, 38945), (855, 23367), (2565, 7789)]