28220745

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{397}}^1\times {\mathrm{677}}^1$

素因数の和:1089

約数の個数: 32

約数和(自身を含む): 51810048

約数和(自身を除く): 23589303

約数列:

[1, 3, 5, 7, 15, 21, 35, 105, 397, 677, 1191, 1985, 2031, 2779, 3385, 4739, 5955, 8337, 10155, 13895, 14217, 23695, 41685, 71085, 268769, 806307, 1343845, 1881383, 4031535, 5644149, 9406915, 28220745]

約数ペア:

[(1, 28220745), (3, 9406915), (5, 5644149), (7, 4031535), (15, 1881383), (21, 1343845), (35, 806307), (105, 268769), (397, 71085), (677, 41685), (1191, 23695), (1985, 14217), (2031, 13895), (2779, 10155), (3385, 8337), (4739, 5955)]