20893257

素因数分解:

$3^2\times 7^2\times {\mathrm{11}}^1\times {\mathrm{59}}^1\times {\mathrm{73}}^1$

素因数の和:163

約数の個数: 72

約数和(自身を含む): 39480480

約数和(自身を除く): 18587223

約数列:

[1, 3, 7, 9, 11, 21, 33, 49, 59, 63, 73, 77, 99, 147, 177, 219, 231, 413, 441, 511, 531, 539, 649, 657, 693, 803, 1239, 1533, 1617, 1947, 2409, 2891, 3577, 3717, 4307, 4543, 4599, 4851, 5621, 5841, 7227, 8673, 10731, 12921, 13629, 16863, 26019, 30149, 31801, 32193, 38763, 39347, 40887, 47377, 50589, 90447, 95403, 118041, 142131, 211043, 271341, 286209, 331639, 354123, 426393, 633129, 994917, 1899387, 2321473, 2984751, 6964419, 20893257]

約数ペア:

[(1, 20893257), (3, 6964419), (7, 2984751), (9, 2321473), (11, 1899387), (21, 994917), (33, 633129), (49, 426393), (59, 354123), (63, 331639), (73, 286209), (77, 271341), (99, 211043), (147, 142131), (177, 118041), (219, 95403), (231, 90447), (413, 50589), (441, 47377), (511, 40887), (531, 39347), (539, 38763), (649, 32193), (657, 31801), (693, 30149), (803, 26019), (1239, 16863), (1533, 13629), (1617, 12921), (1947, 10731), (2409, 8673), (2891, 7227), (3577, 5841), (3717, 5621), (4307, 4851), (4543, 4599)]