21189345

素因数分解:

$3^1\times 5^1\times {\mathrm{37}}^1\times {\mathrm{73}}^1\times {\mathrm{523}}^1$

素因数の和:641

約数の個数: 32

約数和(自身を含む): 35363712

約数和(自身を除く): 14174367

約数列:

[1, 3, 5, 15, 37, 73, 111, 185, 219, 365, 523, 555, 1095, 1569, 2615, 2701, 7845, 8103, 13505, 19351, 38179, 40515, 58053, 96755, 114537, 190895, 290265, 572685, 1412623, 4237869, 7063115, 21189345]

約数ペア:

[(1, 21189345), (3, 7063115), (5, 4237869), (15, 1412623), (37, 572685), (73, 290265), (111, 190895), (185, 114537), (219, 96755), (365, 58053), (523, 40515), (555, 38179), (1095, 19351), (1569, 13505), (2615, 8103), (2701, 7845)]