21087610065

素因数分解:

$3^4\times 5^1\times {\mathrm{52068173}}^1$

素因数の和:52068190

約数の個数: 20

約数和(自身を含む): 37801494324

約数和(自身を除く): 16713884259

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 405, 52068173, 156204519, 260340865, 468613557, 781022595, 1405840671, 2343067785, 4217522013, 7029203355, 21087610065]

約数ペア:

[(1, 21087610065), (3, 7029203355), (5, 4217522013), (9, 2343067785), (15, 1405840671), (27, 781022595), (45, 468613557), (81, 260340865), (135, 156204519), (405, 52068173)]