20957643

素因数分解:

$3^3\times 7^3\times {\mathrm{31}}^1\times {\mathrm{73}}^1$

素因数の和:134

約数の個数: 64

約数和(自身を含む): 37888000

約数和(自身を除く): 16930357

約数列:

[1, 3, 7, 9, 21, 27, 31, 49, 63, 73, 93, 147, 189, 217, 219, 279, 343, 441, 511, 651, 657, 837, 1029, 1323, 1519, 1533, 1953, 1971, 2263, 3087, 3577, 4557, 4599, 5859, 6789, 9261, 10633, 10731, 13671, 13797, 15841, 20367, 25039, 31899, 32193, 41013, 47523, 61101, 75117, 95697, 96579, 110887, 142569, 225351, 287091, 332661, 427707, 676053, 776209, 997983, 2328627, 2993949, 6985881, 20957643]

約数ペア:

[(1, 20957643), (3, 6985881), (7, 2993949), (9, 2328627), (21, 997983), (27, 776209), (31, 676053), (49, 427707), (63, 332661), (73, 287091), (93, 225351), (147, 142569), (189, 110887), (217, 96579), (219, 95697), (279, 75117), (343, 61101), (441, 47523), (511, 41013), (651, 32193), (657, 31899), (837, 25039), (1029, 20367), (1323, 15841), (1519, 13797), (1533, 13671), (1953, 10731), (1971, 10633), (2263, 9261), (3087, 6789), (3577, 5859), (4557, 4599)]