21270424

素因数分解:

$2^3\times 7^1\times {\mathrm{19}}^1\times {\mathrm{19991}}^1$

素因数の和:20023

約数の個数: 32

約数和(自身を含む): 47980800

約数和(自身を除く): 26710376

約数列:

[1, 2, 4, 7, 8, 14, 19, 28, 38, 56, 76, 133, 152, 266, 532, 1064, 19991, 39982, 79964, 139937, 159928, 279874, 379829, 559748, 759658, 1119496, 1519316, 2658803, 3038632, 5317606, 10635212, 21270424]

約数ペア:

[(1, 21270424), (2, 10635212), (4, 5317606), (7, 3038632), (8, 2658803), (14, 1519316), (19, 1119496), (28, 759658), (38, 559748), (56, 379829), (76, 279874), (133, 159928), (152, 139937), (266, 79964), (532, 39982), (1064, 19991)]