21290992

素因数分解:

$2^4\times {\mathrm{67}}^1\times {\mathrm{19861}}^1$

素因数の和:19936

約数の個数: 20

約数和(自身を含む): 41869096

約数和(自身を除く): 20578104

約数列:

[1, 2, 4, 8, 16, 67, 134, 268, 536, 1072, 19861, 39722, 79444, 158888, 317776, 1330687, 2661374, 5322748, 10645496, 21290992]

約数ペア:

[(1, 21290992), (2, 10645496), (4, 5322748), (8, 2661374), (16, 1330687), (67, 317776), (134, 158888), (268, 79444), (536, 39722), (1072, 19861)]