20985225

素因数分解:

$3^1\times 5^2\times {\mathrm{17}}^1\times {\mathrm{109}}^1\times {\mathrm{151}}^1$

素因数の和:290

約数の個数: 48

約数和(自身を含む): 37319040

約数和(自身を除く): 16333815

約数列:

[1, 3, 5, 15, 17, 25, 51, 75, 85, 109, 151, 255, 327, 425, 453, 545, 755, 1275, 1635, 1853, 2265, 2567, 2725, 3775, 5559, 7701, 8175, 9265, 11325, 12835, 16459, 27795, 38505, 46325, 49377, 64175, 82295, 138975, 192525, 246885, 279803, 411475, 839409, 1234425, 1399015, 4197045, 6995075, 20985225]

約数ペア:

[(1, 20985225), (3, 6995075), (5, 4197045), (15, 1399015), (17, 1234425), (25, 839409), (51, 411475), (75, 279803), (85, 246885), (109, 192525), (151, 138975), (255, 82295), (327, 64175), (425, 49377), (453, 46325), (545, 38505), (755, 27795), (1275, 16459), (1635, 12835), (1853, 11325), (2265, 9265), (2567, 8175), (2725, 7701), (3775, 5559)]