21335643

素因数分解:

$3^6\times 7^1\times {\mathrm{37}}^1\times {\mathrm{113}}^1$

素因数の和:175

約数の個数: 56

約数和(自身を含む): 37879008

約数和(自身を除く): 16543365

約数列:

[1, 3, 7, 9, 21, 27, 37, 63, 81, 111, 113, 189, 243, 259, 333, 339, 567, 729, 777, 791, 999, 1017, 1701, 2331, 2373, 2997, 3051, 4181, 5103, 6993, 7119, 8991, 9153, 12543, 20979, 21357, 26973, 27459, 29267, 37629, 62937, 64071, 82377, 87801, 112887, 188811, 192213, 263403, 338661, 576639, 790209, 1015983, 2370627, 3047949, 7111881, 21335643]

約数ペア:

[(1, 21335643), (3, 7111881), (7, 3047949), (9, 2370627), (21, 1015983), (27, 790209), (37, 576639), (63, 338661), (81, 263403), (111, 192213), (113, 188811), (189, 112887), (243, 87801), (259, 82377), (333, 64071), (339, 62937), (567, 37629), (729, 29267), (777, 27459), (791, 26973), (999, 21357), (1017, 20979), (1701, 12543), (2331, 9153), (2373, 8991), (2997, 7119), (3051, 6993), (4181, 5103)]