20400688

素因数分解:

$2^4\times 7^1\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{571}}^1$

素因数の和:626

約数の個数: 80

約数和(自身を含む): 51068160

約数和(自身を除く): 30667472

約数列:

[1, 2, 4, 7, 8, 11, 14, 16, 22, 28, 29, 44, 56, 58, 77, 88, 112, 116, 154, 176, 203, 232, 308, 319, 406, 464, 571, 616, 638, 812, 1142, 1232, 1276, 1624, 2233, 2284, 2552, 3248, 3997, 4466, 4568, 5104, 6281, 7994, 8932, 9136, 12562, 15988, 16559, 17864, 25124, 31976, 33118, 35728, 43967, 50248, 63952, 66236, 87934, 100496, 115913, 132472, 175868, 182149, 231826, 264944, 351736, 364298, 463652, 703472, 728596, 927304, 1275043, 1457192, 1854608, 2550086, 2914384, 5100172, 10200344, 20400688]

約数ペア:

[(1, 20400688), (2, 10200344), (4, 5100172), (7, 2914384), (8, 2550086), (11, 1854608), (14, 1457192), (16, 1275043), (22, 927304), (28, 728596), (29, 703472), (44, 463652), (56, 364298), (58, 351736), (77, 264944), (88, 231826), (112, 182149), (116, 175868), (154, 132472), (176, 115913), (203, 100496), (232, 87934), (308, 66236), (319, 63952), (406, 50248), (464, 43967), (571, 35728), (616, 33118), (638, 31976), (812, 25124), (1142, 17864), (1232, 16559), (1276, 15988), (1624, 12562), (2233, 9136), (2284, 8932), (2552, 7994), (3248, 6281), (3997, 5104), (4466, 4568)]