20983455

素因数分解:

$3^4\times 5^1\times {\mathrm{197}}^1\times {\mathrm{263}}^1$

素因数の和:477

約数の個数: 40

約数和(自身を含む): 37949472

約数和(自身を除く): 16966017

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 197, 263, 405, 591, 789, 985, 1315, 1773, 2367, 2955, 3945, 5319, 7101, 8865, 11835, 15957, 21303, 26595, 35505, 51811, 79785, 106515, 155433, 259055, 466299, 777165, 1398897, 2331495, 4196691, 6994485, 20983455]

約数ペア:

[(1, 20983455), (3, 6994485), (5, 4196691), (9, 2331495), (15, 1398897), (27, 777165), (45, 466299), (81, 259055), (135, 155433), (197, 106515), (263, 79785), (405, 51811), (591, 35505), (789, 26595), (985, 21303), (1315, 15957), (1773, 11835), (2367, 8865), (2955, 7101), (3945, 5319)]