20255805

素因数分解:

$3^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{53}}^1\times {\mathrm{149}}^1$

素因数の和:235

約数の個数: 64

約数和(自身を含む): 38880000

約数和(自身を除く): 18624195

約数列:

[1, 3, 5, 9, 15, 19, 27, 45, 53, 57, 95, 135, 149, 159, 171, 265, 285, 447, 477, 513, 745, 795, 855, 1007, 1341, 1431, 2235, 2385, 2565, 2831, 3021, 4023, 5035, 6705, 7155, 7897, 8493, 9063, 14155, 15105, 20115, 23691, 25479, 27189, 39485, 42465, 45315, 71073, 76437, 118455, 127395, 135945, 150043, 213219, 355365, 382185, 450129, 750215, 1066095, 1350387, 2250645, 4051161, 6751935, 20255805]

約数ペア:

[(1, 20255805), (3, 6751935), (5, 4051161), (9, 2250645), (15, 1350387), (19, 1066095), (27, 750215), (45, 450129), (53, 382185), (57, 355365), (95, 213219), (135, 150043), (149, 135945), (159, 127395), (171, 118455), (265, 76437), (285, 71073), (447, 45315), (477, 42465), (513, 39485), (745, 27189), (795, 25479), (855, 23691), (1007, 20115), (1341, 15105), (1431, 14155), (2235, 9063), (2385, 8493), (2565, 7897), (2831, 7155), (3021, 6705), (4023, 5035)]