21395816

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{419}}^1\times {\mathrm{491}}^1$

素因数の和:929

約数の個数: 32

約数和(自身を含む): 43394400

約数和(自身を除く): 21998584

約数列:

[1, 2, 4, 8, 13, 26, 52, 104, 419, 491, 838, 982, 1676, 1964, 3352, 3928, 5447, 6383, 10894, 12766, 21788, 25532, 43576, 51064, 205729, 411458, 822916, 1645832, 2674477, 5348954, 10697908, 21395816]

約数ペア:

[(1, 21395816), (2, 10697908), (4, 5348954), (8, 2674477), (13, 1645832), (26, 822916), (52, 411458), (104, 205729), (419, 51064), (491, 43576), (838, 25532), (982, 21788), (1676, 12766), (1964, 10894), (3352, 6383), (3928, 5447)]