21274240

素因数分解:

$2^7\times 5^1\times {\mathrm{13}}^1\times {\mathrm{2557}}^1$

素因数の和:2589

約数の個数: 64

約数和(自身を含む): 54792360

約数和(自身を除く): 33518120

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 32, 40, 52, 64, 65, 80, 104, 128, 130, 160, 208, 260, 320, 416, 520, 640, 832, 1040, 1664, 2080, 2557, 4160, 5114, 8320, 10228, 12785, 20456, 25570, 33241, 40912, 51140, 66482, 81824, 102280, 132964, 163648, 166205, 204560, 265928, 327296, 332410, 409120, 531856, 664820, 818240, 1063712, 1329640, 1636480, 2127424, 2659280, 4254848, 5318560, 10637120, 21274240]

約数ペア:

[(1, 21274240), (2, 10637120), (4, 5318560), (5, 4254848), (8, 2659280), (10, 2127424), (13, 1636480), (16, 1329640), (20, 1063712), (26, 818240), (32, 664820), (40, 531856), (52, 409120), (64, 332410), (65, 327296), (80, 265928), (104, 204560), (128, 166205), (130, 163648), (160, 132964), (208, 102280), (260, 81824), (320, 66482), (416, 51140), (520, 40912), (640, 33241), (832, 25570), (1040, 20456), (1664, 12785), (2080, 10228), (2557, 8320), (4160, 5114)]