21505246

素因数分解:

$2^1\times 7^1\times {\mathrm{43}}^1\times {\mathrm{139}}^1\times {\mathrm{257}}^1$

素因数の和:448

約数の個数: 32

約数和(自身を含む): 38142720

約数和(自身を除く): 16637474

約数列:

[1, 2, 7, 14, 43, 86, 139, 257, 278, 301, 514, 602, 973, 1799, 1946, 3598, 5977, 11051, 11954, 22102, 35723, 41839, 71446, 77357, 83678, 154714, 250061, 500122, 1536089, 3072178, 10752623, 21505246]

約数ペア:

[(1, 21505246), (2, 10752623), (7, 3072178), (14, 1536089), (43, 500122), (86, 250061), (139, 154714), (257, 83678), (278, 77357), (301, 71446), (514, 41839), (602, 35723), (973, 22102), (1799, 11954), (1946, 11051), (3598, 5977)]