21517538

素因数分解:

$2^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{41}}^1\times {\mathrm{1973}}^1$

素因数の和:2042

約数の個数: 32

約数和(自身を含む): 39795840

約数和(自身を除く): 18278302

約数列:

[1, 2, 7, 14, 19, 38, 41, 82, 133, 266, 287, 574, 779, 1558, 1973, 3946, 5453, 10906, 13811, 27622, 37487, 74974, 80893, 161786, 262409, 524818, 566251, 1132502, 1536967, 3073934, 10758769, 21517538]

約数ペア:

[(1, 21517538), (2, 10758769), (7, 3073934), (14, 1536967), (19, 1132502), (38, 566251), (41, 524818), (82, 262409), (133, 161786), (266, 80893), (287, 74974), (574, 37487), (779, 27622), (1558, 13811), (1973, 10906), (3946, 5453)]