20387475

素因数分解:

$3^2\times 5^2\times {\mathrm{19}}^2\times {\mathrm{251}}^1$

素因数の和:305

約数の個数: 54

約数和(自身を含む): 38692836

約数和(自身を除く): 18305361

約数列:

[1, 3, 5, 9, 15, 19, 25, 45, 57, 75, 95, 171, 225, 251, 285, 361, 475, 753, 855, 1083, 1255, 1425, 1805, 2259, 3249, 3765, 4275, 4769, 5415, 6275, 9025, 11295, 14307, 16245, 18825, 23845, 27075, 42921, 56475, 71535, 81225, 90611, 119225, 214605, 271833, 357675, 453055, 815499, 1073025, 1359165, 2265275, 4077495, 6795825, 20387475]

約数ペア:

[(1, 20387475), (3, 6795825), (5, 4077495), (9, 2265275), (15, 1359165), (19, 1073025), (25, 815499), (45, 453055), (57, 357675), (75, 271833), (95, 214605), (171, 119225), (225, 90611), (251, 81225), (285, 71535), (361, 56475), (475, 42921), (753, 27075), (855, 23845), (1083, 18825), (1255, 16245), (1425, 14307), (1805, 11295), (2259, 9025), (3249, 6275), (3765, 5415), (4275, 4769)]