18960784

素因数分解:

$2^4\times {\mathrm{19}}^1\times {\mathrm{97}}^1\times {\mathrm{643}}^1$

素因数の和:767

約数の個数: 40

約数和(自身を含む): 39129440

約数和(自身を除く): 20168656

約数列:

[1, 2, 4, 8, 16, 19, 38, 76, 97, 152, 194, 304, 388, 643, 776, 1286, 1552, 1843, 2572, 3686, 5144, 7372, 10288, 12217, 14744, 24434, 29488, 48868, 62371, 97736, 124742, 195472, 249484, 498968, 997936, 1185049, 2370098, 4740196, 9480392, 18960784]

約数ペア:

[(1, 18960784), (2, 9480392), (4, 4740196), (8, 2370098), (16, 1185049), (19, 997936), (38, 498968), (76, 249484), (97, 195472), (152, 124742), (194, 97736), (304, 62371), (388, 48868), (643, 29488), (776, 24434), (1286, 14744), (1552, 12217), (1843, 10288), (2572, 7372), (3686, 5144)]