640427036

素因数分解:

$2^2\times {\mathrm{43}}^2\times {\mathrm{131}}^1\times {\mathrm{661}}^1$

素因数の和:882

約数の個数: 36

約数和(自身を含む): 1157925384

約数和(自身を除く): 517498348

約数列:

[1, 2, 4, 43, 86, 131, 172, 262, 524, 661, 1322, 1849, 2644, 3698, 5633, 7396, 11266, 22532, 28423, 56846, 86591, 113692, 173182, 242219, 346364, 484438, 968876, 1222189, 2444378, 3723413, 4888756, 7446826, 14893652, 160106759, 320213518, 640427036]

約数ペア:

[(1, 640427036), (2, 320213518), (4, 160106759), (43, 14893652), (86, 7446826), (131, 4888756), (172, 3723413), (262, 2444378), (524, 1222189), (661, 968876), (1322, 484438), (1849, 346364), (2644, 242219), (3698, 173182), (5633, 113692), (7396, 86591), (11266, 56846), (22532, 28423)]