21085308

素因数分解:

$2^2\times 3^2\times {\mathrm{43}}^1\times {\mathrm{53}}^1\times {\mathrm{257}}^1$

素因数の和:363

約数の個数: 72

約数和(自身を含む): 55783728

約数和(自身を除く): 34698420

約数列:

[1, 2, 3, 4, 6, 9, 12, 18, 36, 43, 53, 86, 106, 129, 159, 172, 212, 257, 258, 318, 387, 477, 514, 516, 636, 771, 774, 954, 1028, 1542, 1548, 1908, 2279, 2313, 3084, 4558, 4626, 6837, 9116, 9252, 11051, 13621, 13674, 20511, 22102, 27242, 27348, 33153, 40863, 41022, 44204, 54484, 66306, 81726, 82044, 99459, 122589, 132612, 163452, 198918, 245178, 397836, 490356, 585703, 1171406, 1757109, 2342812, 3514218, 5271327, 7028436, 10542654, 21085308]

約数ペア:

[(1, 21085308), (2, 10542654), (3, 7028436), (4, 5271327), (6, 3514218), (9, 2342812), (12, 1757109), (18, 1171406), (36, 585703), (43, 490356), (53, 397836), (86, 245178), (106, 198918), (129, 163452), (159, 132612), (172, 122589), (212, 99459), (257, 82044), (258, 81726), (318, 66306), (387, 54484), (477, 44204), (514, 41022), (516, 40863), (636, 33153), (771, 27348), (774, 27242), (954, 22102), (1028, 20511), (1542, 13674), (1548, 13621), (1908, 11051), (2279, 9252), (2313, 9116), (3084, 6837), (4558, 4626)]