81544880

素因数分解:

$2^4\times 5^1\times {\mathrm{31}}^1\times {\mathrm{131}}^1\times {\mathrm{251}}^1$

素因数の和:426

約数の個数: 80

約数和(自身を含む): 197987328

約数和(自身を除く): 116442448

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 40, 62, 80, 124, 131, 155, 248, 251, 262, 310, 496, 502, 524, 620, 655, 1004, 1048, 1240, 1255, 1310, 2008, 2096, 2480, 2510, 2620, 4016, 4061, 5020, 5240, 7781, 8122, 10040, 10480, 15562, 16244, 20080, 20305, 31124, 32488, 32881, 38905, 40610, 62248, 64976, 65762, 77810, 81220, 124496, 131524, 155620, 162440, 164405, 263048, 311240, 324880, 328810, 526096, 622480, 657620, 1019311, 1315240, 2038622, 2630480, 4077244, 5096555, 8154488, 10193110, 16308976, 20386220, 40772440, 81544880]

約数ペア:

[(1, 81544880), (2, 40772440), (4, 20386220), (5, 16308976), (8, 10193110), (10, 8154488), (16, 5096555), (20, 4077244), (31, 2630480), (40, 2038622), (62, 1315240), (80, 1019311), (124, 657620), (131, 622480), (155, 526096), (248, 328810), (251, 324880), (262, 311240), (310, 263048), (496, 164405), (502, 162440), (524, 155620), (620, 131524), (655, 124496), (1004, 81220), (1048, 77810), (1240, 65762), (1255, 64976), (1310, 62248), (2008, 40610), (2096, 38905), (2480, 32881), (2510, 32488), (2620, 31124), (4016, 20305), (4061, 20080), (5020, 16244), (5240, 15562), (7781, 10480), (8122, 10040)]