21108315

素因数分解:

$3^1\times 5^1\times {\mathrm{37}}^1\times {\mathrm{73}}^1\times {\mathrm{521}}^1$

素因数の和:639

約数の個数: 32

約数和(自身を含む): 35228736

約数和(自身を除く): 14120421

約数列:

[1, 3, 5, 15, 37, 73, 111, 185, 219, 365, 521, 555, 1095, 1563, 2605, 2701, 7815, 8103, 13505, 19277, 38033, 40515, 57831, 96385, 114099, 190165, 289155, 570495, 1407221, 4221663, 7036105, 21108315]

約数ペア:

[(1, 21108315), (3, 7036105), (5, 4221663), (15, 1407221), (37, 570495), (73, 289155), (111, 190165), (185, 114099), (219, 96385), (365, 57831), (521, 40515), (555, 38033), (1095, 19277), (1563, 13505), (2605, 8103), (2701, 7815)]