20978888

素因数分解:

$2^3\times 7^1\times {\mathrm{19}}^1\times {\mathrm{19717}}^1$

素因数の和:19749

約数の個数: 32

約数和(自身を含む): 47323200

約数和(自身を除く): 26344312

約数列:

[1, 2, 4, 7, 8, 14, 19, 28, 38, 56, 76, 133, 152, 266, 532, 1064, 19717, 39434, 78868, 138019, 157736, 276038, 374623, 552076, 749246, 1104152, 1498492, 2622361, 2996984, 5244722, 10489444, 20978888]

約数ペア:

[(1, 20978888), (2, 10489444), (4, 5244722), (7, 2996984), (8, 2622361), (14, 1498492), (19, 1104152), (28, 749246), (38, 552076), (56, 374623), (76, 276038), (133, 157736), (152, 138019), (266, 78868), (532, 39434), (1064, 19717)]