20907195

素因数分解:

$3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{163}}^1\times {\mathrm{503}}^1$

素因数の和:691

約数の個数: 32

約数和(自身を含む): 35707392

約数和(自身を除く): 14800197

約数列:

[1, 3, 5, 15, 17, 51, 85, 163, 255, 489, 503, 815, 1509, 2445, 2515, 2771, 7545, 8313, 8551, 13855, 25653, 41565, 42755, 81989, 128265, 245967, 409945, 1229835, 1393813, 4181439, 6969065, 20907195]

約数ペア:

[(1, 20907195), (3, 6969065), (5, 4181439), (15, 1393813), (17, 1229835), (51, 409945), (85, 245967), (163, 128265), (255, 81989), (489, 42755), (503, 41565), (815, 25653), (1509, 13855), (2445, 8551), (2515, 8313), (2771, 7545)]