21064635

素因数分解:

$3^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{71}}^1\times {\mathrm{347}}^1$

素因数の和:448

約数の個数: 48

約数和(自身を含む): 39087360

約数和(自身を除く): 18022725

約数列:

[1, 3, 5, 9, 15, 19, 45, 57, 71, 95, 171, 213, 285, 347, 355, 639, 855, 1041, 1065, 1349, 1735, 3123, 3195, 4047, 5205, 6593, 6745, 12141, 15615, 19779, 20235, 24637, 32965, 59337, 60705, 73911, 98895, 123185, 221733, 296685, 369555, 468103, 1108665, 1404309, 2340515, 4212927, 7021545, 21064635]

約数ペア:

[(1, 21064635), (3, 7021545), (5, 4212927), (9, 2340515), (15, 1404309), (19, 1108665), (45, 468103), (57, 369555), (71, 296685), (95, 221733), (171, 123185), (213, 98895), (285, 73911), (347, 60705), (355, 59337), (639, 32965), (855, 24637), (1041, 20235), (1065, 19779), (1349, 15615), (1735, 12141), (3123, 6745), (3195, 6593), (4047, 5205)]