81191680

素因数分解:

$2^8\times 5^1\times {\mathrm{137}}^1\times {\mathrm{463}}^1$

素因数の和:621

約数の個数: 72

約数和(自身を含む): 196322112

約数和(自身を除く): 115130432

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 137, 160, 256, 274, 320, 463, 548, 640, 685, 926, 1096, 1280, 1370, 1852, 2192, 2315, 2740, 3704, 4384, 4630, 5480, 7408, 8768, 9260, 10960, 14816, 17536, 18520, 21920, 29632, 35072, 37040, 43840, 59264, 63431, 74080, 87680, 118528, 126862, 148160, 175360, 253724, 296320, 317155, 507448, 592640, 634310, 1014896, 1268620, 2029792, 2537240, 4059584, 5074480, 8119168, 10148960, 16238336, 20297920, 40595840, 81191680]

約数ペア:

[(1, 81191680), (2, 40595840), (4, 20297920), (5, 16238336), (8, 10148960), (10, 8119168), (16, 5074480), (20, 4059584), (32, 2537240), (40, 2029792), (64, 1268620), (80, 1014896), (128, 634310), (137, 592640), (160, 507448), (256, 317155), (274, 296320), (320, 253724), (463, 175360), (548, 148160), (640, 126862), (685, 118528), (926, 87680), (1096, 74080), (1280, 63431), (1370, 59264), (1852, 43840), (2192, 37040), (2315, 35072), (2740, 29632), (3704, 21920), (4384, 18520), (4630, 17536), (5480, 14816), (7408, 10960), (8768, 9260)]