21016723

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{41}}^1\times {\mathrm{43}}^1\times {\mathrm{131}}^1$

素因数の和:235

約数の個数: 32

約数和(自身を含む): 27320832

約数和(自身を除く): 6304109

約数列:

[1, 7, 13, 41, 43, 91, 131, 287, 301, 533, 559, 917, 1703, 1763, 3731, 3913, 5371, 5633, 11921, 12341, 22919, 37597, 39431, 69823, 73229, 160433, 230953, 488761, 512603, 1616671, 3002389, 21016723]

約数ペア:

[(1, 21016723), (7, 3002389), (13, 1616671), (41, 512603), (43, 488761), (91, 230953), (131, 160433), (287, 73229), (301, 69823), (533, 39431), (559, 37597), (917, 22919), (1703, 12341), (1763, 11921), (3731, 5633), (3913, 5371)]