21615756

素因数分解:

$2^2\times 3^1\times {\mathrm{43}}^1\times {\mathrm{163}}^1\times {\mathrm{257}}^1$

素因数の和:470

約数の個数: 48

約数和(自身を含む): 52128384

約数和(自身を除く): 30512628

約数列:

[1, 2, 3, 4, 6, 12, 43, 86, 129, 163, 172, 257, 258, 326, 489, 514, 516, 652, 771, 978, 1028, 1542, 1956, 3084, 7009, 11051, 14018, 21027, 22102, 28036, 33153, 41891, 42054, 44204, 66306, 83782, 84108, 125673, 132612, 167564, 251346, 502692, 1801313, 3602626, 5403939, 7205252, 10807878, 21615756]

約数ペア:

[(1, 21615756), (2, 10807878), (3, 7205252), (4, 5403939), (6, 3602626), (12, 1801313), (43, 502692), (86, 251346), (129, 167564), (163, 132612), (172, 125673), (257, 84108), (258, 83782), (326, 66306), (489, 44204), (514, 42054), (516, 41891), (652, 33153), (771, 28036), (978, 22102), (1028, 21027), (1542, 14018), (1956, 11051), (3084, 7009)]