21072128

素因数分解:

$2^8\times 7^1\times {\mathrm{11}}^1\times {\mathrm{1069}}^1$

素因数の和:1103

約数の個数: 72

約数和(自身を含む): 52489920

約数和(自身を除く): 31417792

約数列:

[1, 2, 4, 7, 8, 11, 14, 16, 22, 28, 32, 44, 56, 64, 77, 88, 112, 128, 154, 176, 224, 256, 308, 352, 448, 616, 704, 896, 1069, 1232, 1408, 1792, 2138, 2464, 2816, 4276, 4928, 7483, 8552, 9856, 11759, 14966, 17104, 19712, 23518, 29932, 34208, 47036, 59864, 68416, 82313, 94072, 119728, 136832, 164626, 188144, 239456, 273664, 329252, 376288, 478912, 658504, 752576, 957824, 1317008, 1505152, 1915648, 2634016, 3010304, 5268032, 10536064, 21072128]

約数ペア:

[(1, 21072128), (2, 10536064), (4, 5268032), (7, 3010304), (8, 2634016), (11, 1915648), (14, 1505152), (16, 1317008), (22, 957824), (28, 752576), (32, 658504), (44, 478912), (56, 376288), (64, 329252), (77, 273664), (88, 239456), (112, 188144), (128, 164626), (154, 136832), (176, 119728), (224, 94072), (256, 82313), (308, 68416), (352, 59864), (448, 47036), (616, 34208), (704, 29932), (896, 23518), (1069, 19712), (1232, 17104), (1408, 14966), (1792, 11759), (2138, 9856), (2464, 8552), (2816, 7483), (4276, 4928)]