20781256

素因数分解:

$2^3\times {\mathrm{67}}^1\times {\mathrm{137}}^1\times {\mathrm{283}}^1$

素因数の和:493

約数の個数: 32

約数和(自身を含む): 39975840

約数和(自身を除く): 19194584

約数列:

[1, 2, 4, 8, 67, 134, 137, 268, 274, 283, 536, 548, 566, 1096, 1132, 2264, 9179, 18358, 18961, 36716, 37922, 38771, 73432, 75844, 77542, 151688, 155084, 310168, 2597657, 5195314, 10390628, 20781256]

約数ペア:

[(1, 20781256), (2, 10390628), (4, 5195314), (8, 2597657), (67, 310168), (134, 155084), (137, 151688), (268, 77542), (274, 75844), (283, 73432), (536, 38771), (548, 37922), (566, 36716), (1096, 18961), (1132, 18358), (2264, 9179)]