20972475

素因数分解:

$3^2\times 5^2\times {\mathrm{17}}^1\times {\mathrm{5483}}^1$

素因数の和:5516

約数の個数: 36

約数和(自身を含む): 39780936

約数和(自身を除く): 18808461

約数列:

[1, 3, 5, 9, 15, 17, 25, 45, 51, 75, 85, 153, 225, 255, 425, 765, 1275, 3825, 5483, 16449, 27415, 49347, 82245, 93211, 137075, 246735, 279633, 411225, 466055, 838899, 1233675, 1398165, 2330275, 4194495, 6990825, 20972475]

約数ペア:

[(1, 20972475), (3, 6990825), (5, 4194495), (9, 2330275), (15, 1398165), (17, 1233675), (25, 838899), (45, 466055), (51, 411225), (75, 279633), (85, 246735), (153, 137075), (225, 93211), (255, 82245), (425, 49347), (765, 27415), (1275, 16449), (3825, 5483)]