20405715

素因数分解:

$3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{283}}^1$

素因数の和:344

約数の個数: 64

約数和(自身を含む): 39260160

約数和(自身を除く): 18854445

約数列:

[1, 3, 5, 11, 15, 19, 23, 33, 55, 57, 69, 95, 115, 165, 209, 253, 283, 285, 345, 437, 627, 759, 849, 1045, 1265, 1311, 1415, 2185, 3113, 3135, 3795, 4245, 4807, 5377, 6509, 6555, 9339, 14421, 15565, 16131, 19527, 24035, 26885, 32545, 46695, 59147, 71599, 72105, 80655, 97635, 123671, 177441, 214797, 295735, 357995, 371013, 618355, 887205, 1073985, 1360381, 1855065, 4081143, 6801905, 20405715]

約数ペア:

[(1, 20405715), (3, 6801905), (5, 4081143), (11, 1855065), (15, 1360381), (19, 1073985), (23, 887205), (33, 618355), (55, 371013), (57, 357995), (69, 295735), (95, 214797), (115, 177441), (165, 123671), (209, 97635), (253, 80655), (283, 72105), (285, 71599), (345, 59147), (437, 46695), (627, 32545), (759, 26885), (849, 24035), (1045, 19527), (1265, 16131), (1311, 15565), (1415, 14421), (2185, 9339), (3113, 6555), (3135, 6509), (3795, 5377), (4245, 4807)]