21632848

素因数分解:

$2^4\times {\mathrm{71}}^1\times {\mathrm{137}}^1\times {\mathrm{139}}^1$

素因数の和:355

約数の個数: 40

約数和(自身を含む): 43122240

約数和(自身を除く): 21489392

約数列:

[1, 2, 4, 8, 16, 71, 137, 139, 142, 274, 278, 284, 548, 556, 568, 1096, 1112, 1136, 2192, 2224, 9727, 9869, 19043, 19454, 19738, 38086, 38908, 39476, 76172, 77816, 78952, 152344, 155632, 157904, 304688, 1352053, 2704106, 5408212, 10816424, 21632848]

約数ペア:

[(1, 21632848), (2, 10816424), (4, 5408212), (8, 2704106), (16, 1352053), (71, 304688), (137, 157904), (139, 155632), (142, 152344), (274, 78952), (278, 77816), (284, 76172), (548, 39476), (556, 38908), (568, 38086), (1096, 19738), (1112, 19454), (1136, 19043), (2192, 9869), (2224, 9727)]