18685520

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{61}}^1\times {\mathrm{547}}^1$

素因数の和:628

約数の個数: 80

約数和(自身を含む): 50556288

約数和(自身を除く): 31870768

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 56, 61, 70, 80, 112, 122, 140, 244, 280, 305, 427, 488, 547, 560, 610, 854, 976, 1094, 1220, 1708, 2135, 2188, 2440, 2735, 3416, 3829, 4270, 4376, 4880, 5470, 6832, 7658, 8540, 8752, 10940, 15316, 17080, 19145, 21880, 30632, 33367, 34160, 38290, 43760, 61264, 66734, 76580, 133468, 153160, 166835, 233569, 266936, 306320, 333670, 467138, 533872, 667340, 934276, 1167845, 1334680, 1868552, 2335690, 2669360, 3737104, 4671380, 9342760, 18685520]

約数ペア:

[(1, 18685520), (2, 9342760), (4, 4671380), (5, 3737104), (7, 2669360), (8, 2335690), (10, 1868552), (14, 1334680), (16, 1167845), (20, 934276), (28, 667340), (35, 533872), (40, 467138), (56, 333670), (61, 306320), (70, 266936), (80, 233569), (112, 166835), (122, 153160), (140, 133468), (244, 76580), (280, 66734), (305, 61264), (427, 43760), (488, 38290), (547, 34160), (560, 33367), (610, 30632), (854, 21880), (976, 19145), (1094, 17080), (1220, 15316), (1708, 10940), (2135, 8752), (2188, 8540), (2440, 7658), (2735, 6832), (3416, 5470), (3829, 4880), (4270, 4376)]