20709825

素因数分解:

$3^1\times 5^2\times {\mathrm{17}}^1\times {\mathrm{37}}^1\times {\mathrm{439}}^1$

素因数の和:506

約数の個数: 48

約数和(自身を含む): 37319040

約数和(自身を除く): 16609215

約数列:

[1, 3, 5, 15, 17, 25, 37, 51, 75, 85, 111, 185, 255, 425, 439, 555, 629, 925, 1275, 1317, 1887, 2195, 2775, 3145, 6585, 7463, 9435, 10975, 15725, 16243, 22389, 32925, 37315, 47175, 48729, 81215, 111945, 186575, 243645, 276131, 406075, 559725, 828393, 1218225, 1380655, 4141965, 6903275, 20709825]

約数ペア:

[(1, 20709825), (3, 6903275), (5, 4141965), (15, 1380655), (17, 1218225), (25, 828393), (37, 559725), (51, 406075), (75, 276131), (85, 243645), (111, 186575), (185, 111945), (255, 81215), (425, 48729), (439, 47175), (555, 37315), (629, 32925), (925, 22389), (1275, 16243), (1317, 15725), (1887, 10975), (2195, 9435), (2775, 7463), (3145, 6585)]