21080384

素因数分解:

$2^6\times {\mathrm{13}}^2\times {\mathrm{1949}}^1$

素因数の和:1987

約数の個数: 42

約数和(自身を含む): 45319950

約数和(自身を除く): 24239566

約数列:

[1, 2, 4, 8, 13, 16, 26, 32, 52, 64, 104, 169, 208, 338, 416, 676, 832, 1352, 1949, 2704, 3898, 5408, 7796, 10816, 15592, 25337, 31184, 50674, 62368, 101348, 124736, 202696, 329381, 405392, 658762, 810784, 1317524, 1621568, 2635048, 5270096, 10540192, 21080384]

約数ペア:

[(1, 21080384), (2, 10540192), (4, 5270096), (8, 2635048), (13, 1621568), (16, 1317524), (26, 810784), (32, 658762), (52, 405392), (64, 329381), (104, 202696), (169, 124736), (208, 101348), (338, 62368), (416, 50674), (676, 31184), (832, 25337), (1352, 15592), (1949, 10816), (2704, 7796), (3898, 5408)]