20211525

素因数分解:

$3^6\times 5^2\times {\mathrm{1109}}^1$

素因数の和:1137

約数の個数: 42

約数和(自身を含む): 37610130

約数和(自身を除く): 17398605

約数列:

[1, 3, 5, 9, 15, 25, 27, 45, 75, 81, 135, 225, 243, 405, 675, 729, 1109, 1215, 2025, 3327, 3645, 5545, 6075, 9981, 16635, 18225, 27725, 29943, 49905, 83175, 89829, 149715, 249525, 269487, 449145, 748575, 808461, 1347435, 2245725, 4042305, 6737175, 20211525]

約数ペア:

[(1, 20211525), (3, 6737175), (5, 4042305), (9, 2245725), (15, 1347435), (25, 808461), (27, 748575), (45, 449145), (75, 269487), (81, 249525), (135, 149715), (225, 89829), (243, 83175), (405, 49905), (675, 29943), (729, 27725), (1109, 18225), (1215, 16635), (2025, 9981), (3327, 6075), (3645, 5545)]