21132488

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{317}}^1\times {\mathrm{641}}^1$

素因数の和:977

約数の個数: 32

約数和(自身を含む): 42872760

約数和(自身を除く): 21740272

約数列:

[1, 2, 4, 8, 13, 26, 52, 104, 317, 634, 641, 1268, 1282, 2536, 2564, 4121, 5128, 8242, 8333, 16484, 16666, 32968, 33332, 66664, 203197, 406394, 812788, 1625576, 2641561, 5283122, 10566244, 21132488]

約数ペア:

[(1, 21132488), (2, 10566244), (4, 5283122), (8, 2641561), (13, 1625576), (26, 812788), (52, 406394), (104, 203197), (317, 66664), (634, 33332), (641, 32968), (1268, 16666), (1282, 16484), (2536, 8333), (2564, 8242), (4121, 5128)]