20918912

素因数分解:

$2^7\times 7^1\times {\mathrm{37}}^1\times {\mathrm{631}}^1$

素因数の和:689

約数の個数: 64

約数和(自身を含む): 48992640

約数和(自身を除く): 28073728

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 32, 37, 56, 64, 74, 112, 128, 148, 224, 259, 296, 448, 518, 592, 631, 896, 1036, 1184, 1262, 2072, 2368, 2524, 4144, 4417, 4736, 5048, 8288, 8834, 10096, 16576, 17668, 20192, 23347, 33152, 35336, 40384, 46694, 70672, 80768, 93388, 141344, 163429, 186776, 282688, 326858, 373552, 565376, 653716, 747104, 1307432, 1494208, 2614864, 2988416, 5229728, 10459456, 20918912]

約数ペア:

[(1, 20918912), (2, 10459456), (4, 5229728), (7, 2988416), (8, 2614864), (14, 1494208), (16, 1307432), (28, 747104), (32, 653716), (37, 565376), (56, 373552), (64, 326858), (74, 282688), (112, 186776), (128, 163429), (148, 141344), (224, 93388), (259, 80768), (296, 70672), (448, 46694), (518, 40384), (592, 35336), (631, 33152), (896, 23347), (1036, 20192), (1184, 17668), (1262, 16576), (2072, 10096), (2368, 8834), (2524, 8288), (4144, 5048), (4417, 4736)]