20816865

素因数分解:

$3^3\times 5^1\times {\mathrm{271}}^1\times {\mathrm{569}}^1$

素因数の和:854

約数の個数: 32

約数和(自身を含む): 37209600

約数和(自身を除く): 16392735

約数列:

[1, 3, 5, 9, 15, 27, 45, 135, 271, 569, 813, 1355, 1707, 2439, 2845, 4065, 5121, 7317, 8535, 12195, 15363, 25605, 36585, 76815, 154199, 462597, 770995, 1387791, 2312985, 4163373, 6938955, 20816865]

約数ペア:

[(1, 20816865), (3, 6938955), (5, 4163373), (9, 2312985), (15, 1387791), (27, 770995), (45, 462597), (135, 154199), (271, 76815), (569, 36585), (813, 25605), (1355, 15363), (1707, 12195), (2439, 8535), (2845, 7317), (4065, 5121)]