About the Number
20742645
2進数表記:1001111001000000111110101
漢数字表記:二千七十四万二千六百四十五
素因数分解:
素因数の和:17985
約数の個数: 32
約数和(自身を含む): 41379840
約数和(自身を除く): 20637195
約数列:
[1, 3, 5, 7, 11, 15, 21, 33, 35, 55, 77, 105, 165, 231, 385, 1155, 17959, 53877, 89795, 125713, 197549, 269385, 377139, 592647, 628565, 987745, 1382843, 1885695, 2963235, 4148529, 6914215, 20742645]
約数ペア:
[(1, 20742645), (3, 6914215), (5, 4148529), (7, 2963235), (11, 1885695), (15, 1382843), (21, 987745), (33, 628565), (35, 592647), (55, 377139), (77, 269385), (105, 197549), (165, 125713), (231, 89795), (385, 53877), (1155, 17959)]このpageの処理時間: 0.009312152862548828 seconds