20712328

素因数分解:

$2^3\times 7^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{1237}}^1$

素因数の和:1286

約数の個数: 64

約数和(自身を含む): 49916160

約数和(自身を除く): 29203832

約数列:

[1, 2, 4, 7, 8, 13, 14, 23, 26, 28, 46, 52, 56, 91, 92, 104, 161, 182, 184, 299, 322, 364, 598, 644, 728, 1196, 1237, 1288, 2093, 2392, 2474, 4186, 4948, 8372, 8659, 9896, 16081, 16744, 17318, 28451, 32162, 34636, 56902, 64324, 69272, 112567, 113804, 128648, 199157, 225134, 227608, 369863, 398314, 450268, 739726, 796628, 900536, 1479452, 1593256, 2589041, 2958904, 5178082, 10356164, 20712328]

約数ペア:

[(1, 20712328), (2, 10356164), (4, 5178082), (7, 2958904), (8, 2589041), (13, 1593256), (14, 1479452), (23, 900536), (26, 796628), (28, 739726), (46, 450268), (52, 398314), (56, 369863), (91, 227608), (92, 225134), (104, 199157), (161, 128648), (182, 113804), (184, 112567), (299, 69272), (322, 64324), (364, 56902), (598, 34636), (644, 32162), (728, 28451), (1196, 17318), (1237, 16744), (1288, 16081), (2093, 9896), (2392, 8659), (2474, 8372), (4186, 4948)]