20738128

素因数分解:

$2^4\times {\mathrm{41}}^1\times {\mathrm{101}}^1\times {\mathrm{313}}^1$

素因数の和:463

約数の個数: 40

約数和(自身を含む): 41700456

約数和(自身を除く): 20962328

約数列:

[1, 2, 4, 8, 16, 41, 82, 101, 164, 202, 313, 328, 404, 626, 656, 808, 1252, 1616, 2504, 4141, 5008, 8282, 12833, 16564, 25666, 31613, 33128, 51332, 63226, 66256, 102664, 126452, 205328, 252904, 505808, 1296133, 2592266, 5184532, 10369064, 20738128]

約数ペア:

[(1, 20738128), (2, 10369064), (4, 5184532), (8, 2592266), (16, 1296133), (41, 505808), (82, 252904), (101, 205328), (164, 126452), (202, 102664), (313, 66256), (328, 63226), (404, 51332), (626, 33128), (656, 31613), (808, 25666), (1252, 16564), (1616, 12833), (2504, 8282), (4141, 5008)]